diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index b5a665647..76bd0bfef 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -3,6 +3,7 @@ TODO: Summarize and motivate the changes, link to issues, remove the checklist e
 ## Checklist
 
 - [ ] I added a summary of any user-facing changes (compared to the last release) in the `changelog-entries/<PRnumber>.md`.
+- [ ] If I changed `requirements.txt` files, I regenerated sibling `requirements-reference.txt` files with `python3 tools/releasing/update-requirements-reference.py` (pass a path to update only that directory, or `--all` to refresh everything).
 
 For new tutorials or tutorial cases:
 
diff --git a/.github/workflows/check-requirements-reference.yml b/.github/workflows/check-requirements-reference.yml
new file mode 100644
index 000000000..fc21a0e76
--- /dev/null
+++ b/.github/workflows/check-requirements-reference.yml
@@ -0,0 +1,29 @@
+name: Check requirements-reference
+on:
+  pull_request:
+    branches:
+      - master
+      - develop
+    paths:
+      - '**/requirements.txt'
+      - '**/requirements-reference.txt'
+      - tools/releasing/update-requirements-reference.py
+      - tools/releasing/requirements.txt
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@v7
+      - name: Setup python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.10'
+      - name: Install packaging
+        run: pip install -r tools/releasing/requirements.txt
+      - name: Check requirements-reference.txt files exist
+        if: github.base_ref == 'develop'
+        run: python3 tools/releasing/update-requirements-reference.py --check
+      - name: Check requirements-reference.txt files are up to date
+        if: github.base_ref == 'master'
+        run: python3 tools/releasing/update-requirements-reference.py --check --fail-on-outdated
diff --git a/README.md b/README.md
index e0a766aff..9ea135abf 100644
--- a/README.md
+++ b/README.md
@@ -13,3 +13,5 @@ As a general rule, you can start each participant from inside their `<tutorial>/
 Contributions to this repository are very welcome. Please refer to the page [Contribute to preCICE](https://precice.org/community-contribute-to-precice.html) for a few guidelines and hints to help you in this direction.
 
 Note that we use [Git LFS](https://git-lfs.com/) to version reference results. These will appear as seemingly empty files containing URLs if you don't have Git LFS installed (optional, mainly useful for our system tests).
+
+For Python dependency ranges and the sibling `requirements-reference.txt` files used for reproducible installs, see [`tools/releasing/README.md`](tools/releasing/README.md).
diff --git a/changelog-entries/610.md b/changelog-entries/610.md
new file mode 100644
index 000000000..01b8396c8
--- /dev/null
+++ b/changelog-entries/610.md
@@ -0,0 +1 @@
+- Add loose version constraints to tutorial `requirements.txt` files and sibling `requirements-reference.txt` pins generated from PyPI via `tools/releasing/update-requirements-reference.py`, with a CI check that requires reference files on `develop` and up-to-date pins on release PRs to `master` ([#871](https://github.com/precice/tutorials/pull/871)).
diff --git a/channel-transport-particles/fluid-nutils/requirements-reference.txt b/channel-transport-particles/fluid-nutils/requirements-reference.txt
new file mode 100644
index 000000000..ed997b958
--- /dev/null
+++ b/channel-transport-particles/fluid-nutils/requirements-reference.txt
@@ -0,0 +1,10 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: channel-transport-particles/fluid-nutils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+setuptools==83.0.0
+nutils==7.3
+numpy==1.26.4
+pyprecice==3.4.0
diff --git a/channel-transport-particles/fluid-nutils/requirements.txt b/channel-transport-particles/fluid-nutils/requirements.txt
index e535d45e9..f22e7ac25 100644
--- a/channel-transport-particles/fluid-nutils/requirements.txt
+++ b/channel-transport-particles/fluid-nutils/requirements.txt
@@ -1,5 +1,4 @@
-setuptools # required by nutils
+setuptools>=69.0.0  # required by nutils
 nutils~=7.3
 numpy >1, <2
 pyprecice~=3.0
-setuptools
diff --git a/channel-transport-reaction/chemical-fenics/requirements-reference.txt b/channel-transport-reaction/chemical-fenics/requirements-reference.txt
new file mode 100644
index 000000000..1d98823e4
--- /dev/null
+++ b/channel-transport-reaction/chemical-fenics/requirements-reference.txt
@@ -0,0 +1,13 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: channel-transport-reaction/chemical-fenics/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==1.26.4
+fenicsprecice==2.3.0
+fenics-dijitso==2019.1.0
+# fenics-dolfin~=2019.0  # non-PyPI (system/PPA or no matching PyPI version)
+fenics-ffc==2019.1.0.post0
+fenics-fiat==2019.1.0
+fenics-ufl-legacy==2022.3.0
diff --git a/channel-transport-reaction/fluid-fenics/requirements-reference.txt b/channel-transport-reaction/fluid-fenics/requirements-reference.txt
new file mode 100644
index 000000000..84aede83c
--- /dev/null
+++ b/channel-transport-reaction/fluid-fenics/requirements-reference.txt
@@ -0,0 +1,13 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: channel-transport-reaction/fluid-fenics/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==1.26.4
+fenicsprecice==2.3.0
+fenics-dijitso==2019.1.0
+# fenics-dolfin~=2019.0  # non-PyPI (system/PPA or no matching PyPI version)
+fenics-ffc==2019.1.0.post0
+fenics-fiat==2019.1.0
+fenics-ufl-legacy==2022.3.0
diff --git a/channel-transport/fluid-nutils/requirements-reference.txt b/channel-transport/fluid-nutils/requirements-reference.txt
new file mode 100644
index 000000000..e132bf2fa
--- /dev/null
+++ b/channel-transport/fluid-nutils/requirements-reference.txt
@@ -0,0 +1,10 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: channel-transport/fluid-nutils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+setuptools==83.0.0
+nutils==7.3
+numpy==1.26.4
+pyprecice==3.4.0
diff --git a/channel-transport/fluid-nutils/requirements.txt b/channel-transport/fluid-nutils/requirements.txt
index e535d45e9..f22e7ac25 100644
--- a/channel-transport/fluid-nutils/requirements.txt
+++ b/channel-transport/fluid-nutils/requirements.txt
@@ -1,5 +1,4 @@
-setuptools # required by nutils
+setuptools>=69.0.0  # required by nutils
 nutils~=7.3
 numpy >1, <2
 pyprecice~=3.0
-setuptools
diff --git a/channel-transport/transport-nutils/requirements-reference.txt b/channel-transport/transport-nutils/requirements-reference.txt
new file mode 100644
index 000000000..2f0b780d2
--- /dev/null
+++ b/channel-transport/transport-nutils/requirements-reference.txt
@@ -0,0 +1,10 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: channel-transport/transport-nutils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+setuptools==83.0.0
+nutils==7.3
+numpy==1.26.4
+pyprecice==3.4.0
diff --git a/channel-transport/transport-nutils/requirements.txt b/channel-transport/transport-nutils/requirements.txt
index 575bd072d..0a20f1785 100644
--- a/channel-transport/transport-nutils/requirements.txt
+++ b/channel-transport/transport-nutils/requirements.txt
@@ -1,5 +1,4 @@
-setuptools # required by nutils
+setuptools>=69.0.0  # required by nutils
 nutils~=7.3
 numpy >1, <2
 pyprecice >=3.2 # Remeshing support is available since preCICE version 3.2
-setuptools
diff --git a/elastic-tube-1d/fluid-python/requirements-reference.txt b/elastic-tube-1d/fluid-python/requirements-reference.txt
new file mode 100644
index 000000000..d8c078f9e
--- /dev/null
+++ b/elastic-tube-1d/fluid-python/requirements-reference.txt
@@ -0,0 +1,9 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: elastic-tube-1d/fluid-python/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+matplotlib==3.11.0
+numpy==1.26.4
+pyprecice==3.4.0
diff --git a/elastic-tube-1d/fluid-python/requirements.txt b/elastic-tube-1d/fluid-python/requirements.txt
index 20ab73eb9..b5bbb2731 100644
--- a/elastic-tube-1d/fluid-python/requirements.txt
+++ b/elastic-tube-1d/fluid-python/requirements.txt
@@ -1,3 +1,3 @@
-matplotlib
+matplotlib>=3,<4
 numpy >1, <2
 pyprecice~=3.0
\ No newline at end of file
diff --git a/elastic-tube-1d/solid-python/requirements-reference.txt b/elastic-tube-1d/solid-python/requirements-reference.txt
new file mode 100644
index 000000000..4a2ff2ff8
--- /dev/null
+++ b/elastic-tube-1d/solid-python/requirements-reference.txt
@@ -0,0 +1,8 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: elastic-tube-1d/solid-python/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==1.26.4
+pyprecice==3.4.0
diff --git a/elastic-tube-3d/solid-fenics/requirements-reference.txt b/elastic-tube-3d/solid-fenics/requirements-reference.txt
new file mode 100644
index 000000000..c92bdde74
--- /dev/null
+++ b/elastic-tube-3d/solid-fenics/requirements-reference.txt
@@ -0,0 +1,13 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: elastic-tube-3d/solid-fenics/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+fenicsprecice==2.3.0
+numpy==1.26.4
+fenics-dijitso==2019.1.0
+# fenics-dolfin~=2019.0  # non-PyPI (system/PPA or no matching PyPI version)
+fenics-ffc==2019.1.0.post0
+fenics-fiat==2019.1.0
+fenics-ufl-legacy==2022.3.0
diff --git a/flow-around-controlled-moving-cylinder/controller-fmi/requirements-reference.txt b/flow-around-controlled-moving-cylinder/controller-fmi/requirements-reference.txt
new file mode 100644
index 000000000..b16d9fc92
--- /dev/null
+++ b/flow-around-controlled-moving-cylinder/controller-fmi/requirements-reference.txt
@@ -0,0 +1,8 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: flow-around-controlled-moving-cylinder/controller-fmi/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+pyprecice==3.4.0
+fmiprecice==0.2.1
diff --git a/flow-around-controlled-moving-cylinder/controller-fmi/requirements.txt b/flow-around-controlled-moving-cylinder/controller-fmi/requirements.txt
index e5648c0bb..2e9bc5841 100644
--- a/flow-around-controlled-moving-cylinder/controller-fmi/requirements.txt
+++ b/flow-around-controlled-moving-cylinder/controller-fmi/requirements.txt
@@ -1,2 +1,2 @@
 pyprecice~=3.0
-fmiprecice
\ No newline at end of file
+fmiprecice~=0.2
diff --git a/flow-around-controlled-moving-cylinder/solid-python/requirements-reference.txt b/flow-around-controlled-moving-cylinder/solid-python/requirements-reference.txt
new file mode 100644
index 000000000..49e964158
--- /dev/null
+++ b/flow-around-controlled-moving-cylinder/solid-python/requirements-reference.txt
@@ -0,0 +1,8 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: flow-around-controlled-moving-cylinder/solid-python/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+pyprecice==3.4.0
+numpy==1.26.4
diff --git a/flow-over-heated-plate/README.md b/flow-over-heated-plate/README.md
index 4476e4b9c..7a5048dac 100644
--- a/flow-over-heated-plate/README.md
+++ b/flow-over-heated-plate/README.md
@@ -97,7 +97,7 @@ First generate the output for each run by adding export to the participant `Soli
 </participant>
 ```
 
-After that running a case from this tutorial will export data into `solid-*/precice-exports`. To visualize and compare these results run `python3 plot-final-interface-temperature.py` (You can install the required python packages by running `pip3 install -r plot-final-interface-temperature-requirements.txt`). This will plot the dimensionless temperature `theta = (T-300)/(310-300)` (with `T` being the temperature) across the coupling interface, i.e. where the solid and the fluid meet and exchange heat. The x-axis shows the x coordinate and the y-axis the dimensionless temperature `theta` at the interface. If you want to exclude certain cases, simply comment out the corresponding lines in the script. For reference see below:
+After that running a case from this tutorial will export data into `solid-*/precice-exports`. To visualize and compare these results run `python3 plot-final-interface-temperature/plot-final-interface-temperature.py` (You can install the required python packages by running `pip3 install -r plot-final-interface-temperature/requirements.txt`). This will plot the dimensionless temperature `theta = (T-300)/(310-300)` (with `T` being the temperature) across the coupling interface, i.e. where the solid and the fluid meet and exchange heat. The x-axis shows the x coordinate and the y-axis the dimensionless temperature `theta` at the interface. If you want to exclude certain cases, simply comment out the corresponding lines in the script. For reference see below:
 
 ![Comparison of the results with different solvers](images/tutorials-flow-over-heated-plate-results-comparison.png)
 
diff --git a/flow-over-heated-plate/fluid-su2/requirements-reference.txt b/flow-over-heated-plate/fluid-su2/requirements-reference.txt
new file mode 100644
index 000000000..371f90625
--- /dev/null
+++ b/flow-over-heated-plate/fluid-su2/requirements-reference.txt
@@ -0,0 +1,8 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: flow-over-heated-plate/fluid-su2/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==1.26.4
+pyprecice==3.4.0
diff --git a/flow-over-heated-plate/plot-final-interface-temperature-requirements.txt b/flow-over-heated-plate/plot-final-interface-temperature-requirements.txt
deleted file mode 100644
index b25baafe7..000000000
--- a/flow-over-heated-plate/plot-final-interface-temperature-requirements.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-vtk
-numpy
-matplotlib
-os
\ No newline at end of file
diff --git a/flow-over-heated-plate/plot-final-interface-temperature.py b/flow-over-heated-plate/plot-final-interface-temperature/plot-final-interface-temperature.py
similarity index 84%
rename from flow-over-heated-plate/plot-final-interface-temperature.py
rename to flow-over-heated-plate/plot-final-interface-temperature/plot-final-interface-temperature.py
index 265720c35..693833c5d 100644
--- a/flow-over-heated-plate/plot-final-interface-temperature.py
+++ b/flow-over-heated-plate/plot-final-interface-temperature/plot-final-interface-temperature.py
@@ -3,18 +3,21 @@
 from matplotlib import pyplot as plt
 import numpy as np
 import os
+from pathlib import Path
+
+TUTORIAL_ROOT = Path(__file__).resolve().parent.parent
 
 
 def vtk_to_dict(case):
-    vtkFileName = "solid-{}/precice-exports/Fluid-Mesh-Solid.dt100.vtu".format(
+    vtkFileName = TUTORIAL_ROOT / "solid-{}/precice-exports/Fluid-Mesh-Solid.dt100.vtu".format(
         case)
     if not os.path.exists(vtkFileName):
-        print("No file found for " + vtkFileName)
+        print("No file found for " + str(vtkFileName))
         return {}  # return empty dict if file not found
 
     # read the vtk file as an unstructured grid
     reader = vtk.vtkXMLUnstructuredGridReader()
-    reader.SetFileName(vtkFileName)
+    reader.SetFileName(str(vtkFileName))
     reader.Update()
 
     # obtain the data
diff --git a/flow-over-heated-plate/plot-final-interface-temperature/requirements-reference.txt b/flow-over-heated-plate/plot-final-interface-temperature/requirements-reference.txt
new file mode 100644
index 000000000..56663d071
--- /dev/null
+++ b/flow-over-heated-plate/plot-final-interface-temperature/requirements-reference.txt
@@ -0,0 +1,9 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: flow-over-heated-plate/plot-final-interface-temperature/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==1.26.4
+matplotlib==3.11.0
+vtk==9.6.2
diff --git a/flow-over-heated-plate/plot-final-interface-temperature/requirements.txt b/flow-over-heated-plate/plot-final-interface-temperature/requirements.txt
new file mode 100644
index 000000000..f46f2cdfc
--- /dev/null
+++ b/flow-over-heated-plate/plot-final-interface-temperature/requirements.txt
@@ -0,0 +1,3 @@
+numpy >1, <2
+matplotlib>=3,<4
+vtk>=9,<10
diff --git a/flow-over-heated-plate/solid-dunefem/requirements-reference.txt b/flow-over-heated-plate/solid-dunefem/requirements-reference.txt
new file mode 100644
index 000000000..69ced75fd
--- /dev/null
+++ b/flow-over-heated-plate/solid-dunefem/requirements-reference.txt
@@ -0,0 +1,8 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: flow-over-heated-plate/solid-dunefem/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+dune-fem==2.12.0.2
+pyprecice==3.4.0
diff --git a/flow-over-heated-plate/solid-dunefem/requirements.txt b/flow-over-heated-plate/solid-dunefem/requirements.txt
index c64f2a91d..d9874e290 100644
--- a/flow-over-heated-plate/solid-dunefem/requirements.txt
+++ b/flow-over-heated-plate/solid-dunefem/requirements.txt
@@ -1,2 +1,2 @@
-dune-fem>=2.11   # Known to work with 2.11.0.5, 2.12.0.2
+dune-fem>=2.11
 pyprecice~=3.0
diff --git a/flow-over-heated-plate/solid-fenics/requirements-reference.txt b/flow-over-heated-plate/solid-fenics/requirements-reference.txt
new file mode 100644
index 000000000..e4add9eeb
--- /dev/null
+++ b/flow-over-heated-plate/solid-fenics/requirements-reference.txt
@@ -0,0 +1,13 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: flow-over-heated-plate/solid-fenics/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+fenicsprecice==2.3.0
+numpy==1.26.4
+fenics-dijitso==2019.1.0
+# fenics-dolfin~=2019.0  # non-PyPI (system/PPA or no matching PyPI version)
+fenics-ffc==2019.1.0.post0
+fenics-fiat==2019.1.0
+fenics-ufl-legacy==2022.3.0
diff --git a/flow-over-heated-plate/solid-fenicsx/requirements-reference.txt b/flow-over-heated-plate/solid-fenicsx/requirements-reference.txt
new file mode 100644
index 000000000..592e7cff3
--- /dev/null
+++ b/flow-over-heated-plate/solid-fenicsx/requirements-reference.txt
@@ -0,0 +1,9 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: flow-over-heated-plate/solid-fenicsx/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==1.26.4
+fenicsxprecice==1.0.1
+mpi4py==4.1.2
diff --git a/flow-over-heated-plate/solid-fenicsx/requirements.txt b/flow-over-heated-plate/solid-fenicsx/requirements.txt
index b36876a55..a06d7331a 100644
--- a/flow-over-heated-plate/solid-fenicsx/requirements.txt
+++ b/flow-over-heated-plate/solid-fenicsx/requirements.txt
@@ -1,3 +1,3 @@
-numpy
-fenicsxprecice
+numpy >1, <2
+fenicsxprecice~=1.0
 mpi4py>=3
diff --git a/flow-over-heated-plate/solid-nutils/requirements-reference.txt b/flow-over-heated-plate/solid-nutils/requirements-reference.txt
new file mode 100644
index 000000000..9ef7a6f20
--- /dev/null
+++ b/flow-over-heated-plate/solid-nutils/requirements-reference.txt
@@ -0,0 +1,10 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: flow-over-heated-plate/solid-nutils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+setuptools==83.0.0
+nutils==7.3
+numpy==1.26.4
+pyprecice==3.4.0
diff --git a/flow-over-heated-plate/solid-nutils/requirements.txt b/flow-over-heated-plate/solid-nutils/requirements.txt
index 7ff7b5aa1..f22e7ac25 100644
--- a/flow-over-heated-plate/solid-nutils/requirements.txt
+++ b/flow-over-heated-plate/solid-nutils/requirements.txt
@@ -1,4 +1,4 @@
-setuptools # required by nutils
+setuptools>=69.0.0  # required by nutils
 nutils~=7.3
 numpy >1, <2
 pyprecice~=3.0
diff --git a/oscillator-overlap/solver-python/requirements-reference.txt b/oscillator-overlap/solver-python/requirements-reference.txt
new file mode 100644
index 000000000..505bd76fc
--- /dev/null
+++ b/oscillator-overlap/solver-python/requirements-reference.txt
@@ -0,0 +1,9 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: oscillator-overlap/solver-python/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==1.26.4
+pyprecice==3.4.0
+scipy==1.18.0
diff --git a/oscillator-overlap/solver-python/requirements.txt b/oscillator-overlap/solver-python/requirements.txt
index 9dff131c5..d61415287 100644
--- a/oscillator-overlap/solver-python/requirements.txt
+++ b/oscillator-overlap/solver-python/requirements.txt
@@ -1,3 +1,3 @@
 numpy >1, <2
 pyprecice~=3.0
-scipy
+scipy>=1.10,<2
diff --git a/oscillator/mass-left-fmi/requirements-reference.txt b/oscillator/mass-left-fmi/requirements-reference.txt
new file mode 100644
index 000000000..49faeb1a1
--- /dev/null
+++ b/oscillator/mass-left-fmi/requirements-reference.txt
@@ -0,0 +1,9 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: oscillator/mass-left-fmi/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+pyprecice==3.4.0
+fmiprecice==0.2.1
+pandas==2.3.3
diff --git a/oscillator/mass-left-fmi/requirements.txt b/oscillator/mass-left-fmi/requirements.txt
index 7fd826089..97d630672 100644
--- a/oscillator/mass-left-fmi/requirements.txt
+++ b/oscillator/mass-left-fmi/requirements.txt
@@ -1,3 +1,3 @@
 pyprecice~=3.0
-fmiprecice
-pandas
\ No newline at end of file
+fmiprecice~=0.2
+pandas>=2.0,<3
diff --git a/oscillator/mass-right-fmi/requirements-reference.txt b/oscillator/mass-right-fmi/requirements-reference.txt
new file mode 100644
index 000000000..2856c302b
--- /dev/null
+++ b/oscillator/mass-right-fmi/requirements-reference.txt
@@ -0,0 +1,9 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: oscillator/mass-right-fmi/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+pyprecice==3.4.0
+fmiprecice==0.2.1
+pandas==2.3.3
diff --git a/oscillator/mass-right-fmi/requirements.txt b/oscillator/mass-right-fmi/requirements.txt
index 7fd826089..97d630672 100644
--- a/oscillator/mass-right-fmi/requirements.txt
+++ b/oscillator/mass-right-fmi/requirements.txt
@@ -1,3 +1,3 @@
 pyprecice~=3.0
-fmiprecice
-pandas
\ No newline at end of file
+fmiprecice~=0.2
+pandas>=2.0,<3
diff --git a/oscillator/solver-fmi/requirements-reference.txt b/oscillator/solver-fmi/requirements-reference.txt
new file mode 100644
index 000000000..b3ab247ea
--- /dev/null
+++ b/oscillator/solver-fmi/requirements-reference.txt
@@ -0,0 +1,9 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: oscillator/solver-fmi/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+pyprecice==3.4.0
+fmiprecice==0.2.1
+pandas==2.3.3
diff --git a/oscillator/solver-fmi/requirements.txt b/oscillator/solver-fmi/requirements.txt
index 7fd826089..97d630672 100644
--- a/oscillator/solver-fmi/requirements.txt
+++ b/oscillator/solver-fmi/requirements.txt
@@ -1,3 +1,3 @@
 pyprecice~=3.0
-fmiprecice
-pandas
\ No newline at end of file
+fmiprecice~=0.2
+pandas>=2.0,<3
diff --git a/oscillator/solver-python/requirements-reference.txt b/oscillator/solver-python/requirements-reference.txt
new file mode 100644
index 000000000..70174e99b
--- /dev/null
+++ b/oscillator/solver-python/requirements-reference.txt
@@ -0,0 +1,9 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: oscillator/solver-python/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==1.26.4
+pyprecice==3.4.0
+scipy==1.18.0
diff --git a/oscillator/solver-python/requirements.txt b/oscillator/solver-python/requirements.txt
index 9dff131c5..d61415287 100644
--- a/oscillator/solver-python/requirements.txt
+++ b/oscillator/solver-python/requirements.txt
@@ -1,3 +1,3 @@
 numpy >1, <2
 pyprecice~=3.0
-scipy
+scipy>=1.10,<2
diff --git a/partitioned-burgers-1d/neumann-surrogate/requirements-reference.txt b/partitioned-burgers-1d/neumann-surrogate/requirements-reference.txt
new file mode 100644
index 000000000..c6401f06a
--- /dev/null
+++ b/partitioned-burgers-1d/neumann-surrogate/requirements-reference.txt
@@ -0,0 +1,12 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: partitioned-burgers-1d/neumann-surrogate/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+--extra-index-url https://download.pytorch.org/whl/cpu
+numpy==2.5.1
+scipy==1.18.0
+torch==2.13.0
+matplotlib==3.11.0
+pyprecice==3.4.0
diff --git a/partitioned-burgers-1d/neumann-surrogate/requirements.txt b/partitioned-burgers-1d/neumann-surrogate/requirements.txt
index a6c5a6ba6..23e338e59 100644
--- a/partitioned-burgers-1d/neumann-surrogate/requirements.txt
+++ b/partitioned-burgers-1d/neumann-surrogate/requirements.txt
@@ -2,8 +2,8 @@
 # --extra-index-url https://download.pytorch.org/whl/cu118
 --extra-index-url https://download.pytorch.org/whl/cpu
 
-numpy~=2.0      # Known to work with 2.3.5
-scipy~=1.0      # Known to work with 1.16.3
-torch~=2.0      # Known to work with 2.9.1
-matplotlib      # Known to work with 3.10.8
-pyprecice~=3.0
\ No newline at end of file
+numpy~=2.0
+scipy~=1.0
+torch~=2.0
+matplotlib>=3,<4
+pyprecice~=3.0
diff --git a/partitioned-burgers-1d/solver-scipy/requirements-reference.txt b/partitioned-burgers-1d/solver-scipy/requirements-reference.txt
new file mode 100644
index 000000000..01b95aa78
--- /dev/null
+++ b/partitioned-burgers-1d/solver-scipy/requirements-reference.txt
@@ -0,0 +1,10 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: partitioned-burgers-1d/solver-scipy/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==2.5.1
+scipy==1.18.0
+matplotlib==3.11.0
+pyprecice==3.4.0
diff --git a/partitioned-burgers-1d/solver-scipy/requirements.txt b/partitioned-burgers-1d/solver-scipy/requirements.txt
index fd0fc69d2..dbf35c764 100644
--- a/partitioned-burgers-1d/solver-scipy/requirements.txt
+++ b/partitioned-burgers-1d/solver-scipy/requirements.txt
@@ -1,4 +1,4 @@
-numpy~=2.0      # Known to work with 2.3.5
-scipy~=1.0      # Known to work with 1.16.3
-matplotlib      # Known to work with 3.10.8
-pyprecice~=3.0
\ No newline at end of file
+numpy~=2.0
+scipy~=1.0
+matplotlib>=3,<4
+pyprecice~=3.0
diff --git a/partitioned-burgers-1d/utils/requirements-reference.txt b/partitioned-burgers-1d/utils/requirements-reference.txt
new file mode 100644
index 000000000..e500ad8f5
--- /dev/null
+++ b/partitioned-burgers-1d/utils/requirements-reference.txt
@@ -0,0 +1,8 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: partitioned-burgers-1d/utils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==2.5.1
+matplotlib==3.11.0
diff --git a/partitioned-burgers-1d/utils/requirements.txt b/partitioned-burgers-1d/utils/requirements.txt
index e0f6fa21d..912335b07 100644
--- a/partitioned-burgers-1d/utils/requirements.txt
+++ b/partitioned-burgers-1d/utils/requirements.txt
@@ -1,2 +1,2 @@
-numpy~=2.0      # Known to work with 2.3.5
-matplotlib      # Known to work with 3.10.8
\ No newline at end of file
+numpy~=2.0
+matplotlib>=3,<4
diff --git a/partitioned-heat-conduction-3d/solver-fenicsx/requirements-reference.txt b/partitioned-heat-conduction-3d/solver-fenicsx/requirements-reference.txt
new file mode 100644
index 000000000..6d1c18017
--- /dev/null
+++ b/partitioned-heat-conduction-3d/solver-fenicsx/requirements-reference.txt
@@ -0,0 +1,11 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: partitioned-heat-conduction-3d/solver-fenicsx/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==1.26.4
+fenicsxprecice==1.0.1
+scipy==1.18.0
+sympy==1.14.0
+gmsh==4.15.2
diff --git a/partitioned-heat-conduction-3d/solver-fenicsx/requirements.txt b/partitioned-heat-conduction-3d/solver-fenicsx/requirements.txt
index 1759af720..0c528ba4b 100644
--- a/partitioned-heat-conduction-3d/solver-fenicsx/requirements.txt
+++ b/partitioned-heat-conduction-3d/solver-fenicsx/requirements.txt
@@ -1,5 +1,5 @@
 numpy >1, <2
-fenicsxprecice
-scipy
-sympy
-gmsh
+fenicsxprecice~=1.0
+scipy>=1.10,<2
+sympy>=1.10,<2
+gmsh>=4,<5
diff --git a/partitioned-heat-conduction-complex/solver-fenics/requirements-reference.txt b/partitioned-heat-conduction-complex/solver-fenics/requirements-reference.txt
new file mode 100644
index 000000000..a23fdc712
--- /dev/null
+++ b/partitioned-heat-conduction-complex/solver-fenics/requirements-reference.txt
@@ -0,0 +1,14 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: partitioned-heat-conduction-complex/solver-fenics/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+fenicsprecice==2.3.0
+numpy==1.26.4
+sympy==1.14.0
+fenics-dijitso==2019.1.0
+# fenics-dolfin~=2019.0  # non-PyPI (system/PPA or no matching PyPI version)
+fenics-ffc==2019.1.0.post0
+fenics-fiat==2019.1.0
+fenics-ufl-legacy==2022.3.0
diff --git a/partitioned-heat-conduction-complex/solver-fenics/requirements.txt b/partitioned-heat-conduction-complex/solver-fenics/requirements.txt
index 04561a50f..9c23e91cf 100644
--- a/partitioned-heat-conduction-complex/solver-fenics/requirements.txt
+++ b/partitioned-heat-conduction-complex/solver-fenics/requirements.txt
@@ -1,6 +1,6 @@
 fenicsprecice~=2.0
 numpy >1, <2
-sympy
+sympy>=1.10,<2
 
 # Assuming FEniCS from ppa:fenics-packages/fenics was installed https://fenicsproject.org/download/archive/
 # Use --system-site-packages in venv
diff --git a/partitioned-heat-conduction-direct/dirichlet-nutils/requirements-reference.txt b/partitioned-heat-conduction-direct/dirichlet-nutils/requirements-reference.txt
new file mode 100644
index 000000000..7c08a5b1d
--- /dev/null
+++ b/partitioned-heat-conduction-direct/dirichlet-nutils/requirements-reference.txt
@@ -0,0 +1,10 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: partitioned-heat-conduction-direct/dirichlet-nutils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+setuptools==83.0.0
+nutils==7.3
+numpy==1.26.4
+pyprecice==3.4.0
diff --git a/partitioned-heat-conduction-direct/dirichlet-nutils/requirements.txt b/partitioned-heat-conduction-direct/dirichlet-nutils/requirements.txt
index 7ff7b5aa1..f22e7ac25 100644
--- a/partitioned-heat-conduction-direct/dirichlet-nutils/requirements.txt
+++ b/partitioned-heat-conduction-direct/dirichlet-nutils/requirements.txt
@@ -1,4 +1,4 @@
-setuptools # required by nutils
+setuptools>=69.0.0  # required by nutils
 nutils~=7.3
 numpy >1, <2
 pyprecice~=3.0
diff --git a/partitioned-heat-conduction-direct/neumann-nutils/requirements-reference.txt b/partitioned-heat-conduction-direct/neumann-nutils/requirements-reference.txt
new file mode 100644
index 000000000..8ad92ab3a
--- /dev/null
+++ b/partitioned-heat-conduction-direct/neumann-nutils/requirements-reference.txt
@@ -0,0 +1,10 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: partitioned-heat-conduction-direct/neumann-nutils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+setuptools==83.0.0
+nutils==7.3
+numpy==1.26.4
+pyprecice==3.4.0
diff --git a/partitioned-heat-conduction-direct/neumann-nutils/requirements.txt b/partitioned-heat-conduction-direct/neumann-nutils/requirements.txt
index 7ff7b5aa1..f22e7ac25 100644
--- a/partitioned-heat-conduction-direct/neumann-nutils/requirements.txt
+++ b/partitioned-heat-conduction-direct/neumann-nutils/requirements.txt
@@ -1,4 +1,4 @@
-setuptools # required by nutils
+setuptools>=69.0.0  # required by nutils
 nutils~=7.3
 numpy >1, <2
 pyprecice~=3.0
diff --git a/partitioned-heat-conduction-overlap/solver-fenics/requirements-reference.txt b/partitioned-heat-conduction-overlap/solver-fenics/requirements-reference.txt
new file mode 100644
index 000000000..2c6e2d19d
--- /dev/null
+++ b/partitioned-heat-conduction-overlap/solver-fenics/requirements-reference.txt
@@ -0,0 +1,13 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: partitioned-heat-conduction-overlap/solver-fenics/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+fenicsprecice==2.3.0
+numpy==1.26.4
+fenics-dijitso==2019.1.0
+# fenics-dolfin~=2019.0  # non-PyPI (system/PPA or no matching PyPI version)
+fenics-ffc==2019.1.0.post0
+fenics-fiat==2019.1.0
+fenics-ufl-legacy==2022.3.0
diff --git a/partitioned-heat-conduction/dirichlet-nutils/requirements-reference.txt b/partitioned-heat-conduction/dirichlet-nutils/requirements-reference.txt
new file mode 100644
index 000000000..14cbc2350
--- /dev/null
+++ b/partitioned-heat-conduction/dirichlet-nutils/requirements-reference.txt
@@ -0,0 +1,10 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: partitioned-heat-conduction/dirichlet-nutils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+setuptools==83.0.0
+nutils==7.3
+numpy==1.26.4
+pyprecice==3.4.0
diff --git a/partitioned-heat-conduction/dirichlet-nutils/requirements.txt b/partitioned-heat-conduction/dirichlet-nutils/requirements.txt
index 7ff7b5aa1..f22e7ac25 100644
--- a/partitioned-heat-conduction/dirichlet-nutils/requirements.txt
+++ b/partitioned-heat-conduction/dirichlet-nutils/requirements.txt
@@ -1,4 +1,4 @@
-setuptools # required by nutils
+setuptools>=69.0.0  # required by nutils
 nutils~=7.3
 numpy >1, <2
 pyprecice~=3.0
diff --git a/partitioned-heat-conduction/neumann-nutils/requirements-reference.txt b/partitioned-heat-conduction/neumann-nutils/requirements-reference.txt
new file mode 100644
index 000000000..18b0188fa
--- /dev/null
+++ b/partitioned-heat-conduction/neumann-nutils/requirements-reference.txt
@@ -0,0 +1,10 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: partitioned-heat-conduction/neumann-nutils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+setuptools==83.0.0
+nutils==7.3
+numpy==1.26.4
+pyprecice==3.4.0
diff --git a/partitioned-heat-conduction/neumann-nutils/requirements.txt b/partitioned-heat-conduction/neumann-nutils/requirements.txt
index 7ff7b5aa1..f22e7ac25 100644
--- a/partitioned-heat-conduction/neumann-nutils/requirements.txt
+++ b/partitioned-heat-conduction/neumann-nutils/requirements.txt
@@ -1,4 +1,4 @@
-setuptools # required by nutils
+setuptools>=69.0.0  # required by nutils
 nutils~=7.3
 numpy >1, <2
 pyprecice~=3.0
diff --git a/partitioned-heat-conduction/solver-fenics/requirements-reference.txt b/partitioned-heat-conduction/solver-fenics/requirements-reference.txt
new file mode 100644
index 000000000..7c3f401ad
--- /dev/null
+++ b/partitioned-heat-conduction/solver-fenics/requirements-reference.txt
@@ -0,0 +1,14 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: partitioned-heat-conduction/solver-fenics/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==1.26.4
+fenicsprecice==2.3.0
+scipy==1.18.0
+fenics-dijitso==2019.1.0
+# fenics-dolfin~=2019.0  # non-PyPI (system/PPA or no matching PyPI version)
+fenics-ffc==2019.1.0.post0
+fenics-fiat==2019.1.0
+fenics-ufl-legacy==2022.3.0
diff --git a/partitioned-heat-conduction/solver-fenics/requirements.txt b/partitioned-heat-conduction/solver-fenics/requirements.txt
index 190ff55e4..b7f8077bd 100644
--- a/partitioned-heat-conduction/solver-fenics/requirements.txt
+++ b/partitioned-heat-conduction/solver-fenics/requirements.txt
@@ -1,6 +1,6 @@
 numpy >1, <2
 fenicsprecice~=2.0
-scipy
+scipy>=1.10,<2
 
 # Assuming FEniCS from ppa:fenics-packages/fenics was installed https://fenicsproject.org/download/archive/
 # Use --system-site-packages in venv
diff --git a/partitioned-heat-conduction/solver-fenicsx/requirements-reference.txt b/partitioned-heat-conduction/solver-fenicsx/requirements-reference.txt
new file mode 100644
index 000000000..00d06da81
--- /dev/null
+++ b/partitioned-heat-conduction/solver-fenicsx/requirements-reference.txt
@@ -0,0 +1,11 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: partitioned-heat-conduction/solver-fenicsx/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==1.26.4
+fenicsxprecice==1.0.1
+scipy==1.18.0
+sympy==1.14.0
+mpi4py==4.1.2
diff --git a/partitioned-heat-conduction/solver-fenicsx/requirements.txt b/partitioned-heat-conduction/solver-fenicsx/requirements.txt
index 85fc7389a..2985d2c89 100644
--- a/partitioned-heat-conduction/solver-fenicsx/requirements.txt
+++ b/partitioned-heat-conduction/solver-fenicsx/requirements.txt
@@ -1,5 +1,5 @@
 numpy >1, <2
-fenicsxprecice
-scipy
-sympy
+fenicsxprecice~=1.0
+scipy>=1.10,<2
+sympy>=1.10,<2
 mpi4py>=3
diff --git a/partitioned-pipe-multiscale/fluid1d-left-nutils/requirements-reference.txt b/partitioned-pipe-multiscale/fluid1d-left-nutils/requirements-reference.txt
new file mode 100644
index 000000000..7e75b4690
--- /dev/null
+++ b/partitioned-pipe-multiscale/fluid1d-left-nutils/requirements-reference.txt
@@ -0,0 +1,11 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: partitioned-pipe-multiscale/fluid1d-left-nutils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+setuptools==83.0.0
+nutils==9.2
+numpy==1.26.4
+pyprecice==3.4.0
+matplotlib==3.11.0
diff --git a/partitioned-pipe-multiscale/fluid1d-left-nutils/requirements.txt b/partitioned-pipe-multiscale/fluid1d-left-nutils/requirements.txt
index 758176da0..55397c89c 100644
--- a/partitioned-pipe-multiscale/fluid1d-left-nutils/requirements.txt
+++ b/partitioned-pipe-multiscale/fluid1d-left-nutils/requirements.txt
@@ -1,5 +1,5 @@
-setuptools # required by nutils
+setuptools>=69.0.0  # required by nutils
 nutils~=9.0
 numpy >1, <2
 pyprecice~=3.0
-matplotlib
\ No newline at end of file
+matplotlib>=3,<4
\ No newline at end of file
diff --git a/partitioned-pipe-multiscale/fluid1d-right-nutils/requirements-reference.txt b/partitioned-pipe-multiscale/fluid1d-right-nutils/requirements-reference.txt
new file mode 100644
index 000000000..05f0edf51
--- /dev/null
+++ b/partitioned-pipe-multiscale/fluid1d-right-nutils/requirements-reference.txt
@@ -0,0 +1,11 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: partitioned-pipe-multiscale/fluid1d-right-nutils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+setuptools==83.0.0
+nutils==9.2
+numpy==1.26.4
+pyprecice==3.4.0
+matplotlib==3.11.0
diff --git a/partitioned-pipe-multiscale/fluid1d-right-nutils/requirements.txt b/partitioned-pipe-multiscale/fluid1d-right-nutils/requirements.txt
index 758176da0..55397c89c 100644
--- a/partitioned-pipe-multiscale/fluid1d-right-nutils/requirements.txt
+++ b/partitioned-pipe-multiscale/fluid1d-right-nutils/requirements.txt
@@ -1,5 +1,5 @@
-setuptools # required by nutils
+setuptools>=69.0.0  # required by nutils
 nutils~=9.0
 numpy >1, <2
 pyprecice~=3.0
-matplotlib
\ No newline at end of file
+matplotlib>=3,<4
\ No newline at end of file
diff --git a/perpendicular-flap/fluid-fake/requirements-reference.txt b/perpendicular-flap/fluid-fake/requirements-reference.txt
new file mode 100644
index 000000000..73b20df37
--- /dev/null
+++ b/perpendicular-flap/fluid-fake/requirements-reference.txt
@@ -0,0 +1,8 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: perpendicular-flap/fluid-fake/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==1.26.4
+pyprecice==3.4.0
diff --git a/perpendicular-flap/fluid-nutils/requirements-reference.txt b/perpendicular-flap/fluid-nutils/requirements-reference.txt
new file mode 100644
index 000000000..34607a82d
--- /dev/null
+++ b/perpendicular-flap/fluid-nutils/requirements-reference.txt
@@ -0,0 +1,11 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: perpendicular-flap/fluid-nutils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+setuptools==83.0.0
+nutils==6.3
+numpy==1.26.4
+pyprecice==3.4.0
+treelog==1.0
diff --git a/perpendicular-flap/fluid-nutils/requirements.txt b/perpendicular-flap/fluid-nutils/requirements.txt
index b81f4ff8f..ecf10833d 100644
--- a/perpendicular-flap/fluid-nutils/requirements.txt
+++ b/perpendicular-flap/fluid-nutils/requirements.txt
@@ -1,4 +1,4 @@
-setuptools # required by nutils
+setuptools>=69.0.0  # required by nutils
 nutils~=6.0
 numpy >1, <2
 pyprecice~=3.0
diff --git a/perpendicular-flap/fluid-su2/requirements-reference.txt b/perpendicular-flap/fluid-su2/requirements-reference.txt
new file mode 100644
index 000000000..c3b9a179d
--- /dev/null
+++ b/perpendicular-flap/fluid-su2/requirements-reference.txt
@@ -0,0 +1,8 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: perpendicular-flap/fluid-su2/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==1.26.4
+pyprecice==3.4.0
diff --git a/perpendicular-flap/solid-fake/requirements-reference.txt b/perpendicular-flap/solid-fake/requirements-reference.txt
new file mode 100644
index 000000000..bc0cb9826
--- /dev/null
+++ b/perpendicular-flap/solid-fake/requirements-reference.txt
@@ -0,0 +1,8 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: perpendicular-flap/solid-fake/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==1.26.4
+pyprecice==3.4.0
diff --git a/perpendicular-flap/solid-fenics/requirements-reference.txt b/perpendicular-flap/solid-fenics/requirements-reference.txt
new file mode 100644
index 000000000..6c3960454
--- /dev/null
+++ b/perpendicular-flap/solid-fenics/requirements-reference.txt
@@ -0,0 +1,14 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: perpendicular-flap/solid-fenics/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+fenicsprecice==2.3.0
+numpy==1.26.4
+matplotlib==3.11.0
+fenics-dijitso==2019.1.0
+# fenics-dolfin~=2019.0  # non-PyPI (system/PPA or no matching PyPI version)
+fenics-ffc==2019.1.0.post0
+fenics-fiat==2019.1.0
+fenics-ufl-legacy==2022.3.0
diff --git a/perpendicular-flap/solid-fenics/requirements.txt b/perpendicular-flap/solid-fenics/requirements.txt
index 1b61f98a2..6ebd5d27d 100644
--- a/perpendicular-flap/solid-fenics/requirements.txt
+++ b/perpendicular-flap/solid-fenics/requirements.txt
@@ -1,6 +1,6 @@
 fenicsprecice~=2.2
 numpy >1, <2
-matplotlib
+matplotlib>=3,<4
 
 # Assuming FEniCS from ppa:fenics-packages/fenics was installed https://fenicsproject.org/download/archive/
 # Use --system-site-packages in venv
diff --git a/perpendicular-flap/solid-nutils/requirements-reference.txt b/perpendicular-flap/solid-nutils/requirements-reference.txt
new file mode 100644
index 000000000..8c76eb728
--- /dev/null
+++ b/perpendicular-flap/solid-nutils/requirements-reference.txt
@@ -0,0 +1,10 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: perpendicular-flap/solid-nutils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+setuptools==83.0.0
+nutils==9.2
+numpy==1.26.4
+pyprecice==3.4.0
diff --git a/perpendicular-flap/solid-nutils/requirements.txt b/perpendicular-flap/solid-nutils/requirements.txt
index 8ae441ba1..cfcb0a3ae 100644
--- a/perpendicular-flap/solid-nutils/requirements.txt
+++ b/perpendicular-flap/solid-nutils/requirements.txt
@@ -1,4 +1,4 @@
-setuptools # required by nutils
+setuptools>=69.0.0  # required by nutils
 nutils>=8.5
 numpy >1, <2
 pyprecice~=3.0
diff --git a/resonant-circuit/capacitor-python/requirements-reference.txt b/resonant-circuit/capacitor-python/requirements-reference.txt
new file mode 100644
index 000000000..daabb56ac
--- /dev/null
+++ b/resonant-circuit/capacitor-python/requirements-reference.txt
@@ -0,0 +1,9 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: resonant-circuit/capacitor-python/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==1.26.4
+scipy==1.18.0
+pyprecice==3.4.0
diff --git a/resonant-circuit/capacitor-python/requirements.txt b/resonant-circuit/capacitor-python/requirements.txt
index 2b8edf2ba..814a5c7dc 100644
--- a/resonant-circuit/capacitor-python/requirements.txt
+++ b/resonant-circuit/capacitor-python/requirements.txt
@@ -1,3 +1,3 @@
 numpy >1, <2
-scipy
+scipy>=1.10,<2
 pyprecice~=3.0
diff --git a/resonant-circuit/coil-python/requirements-reference.txt b/resonant-circuit/coil-python/requirements-reference.txt
new file mode 100644
index 000000000..2c1973a78
--- /dev/null
+++ b/resonant-circuit/coil-python/requirements-reference.txt
@@ -0,0 +1,9 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: resonant-circuit/coil-python/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==1.26.4
+scipy==1.18.0
+pyprecice==3.4.0
diff --git a/resonant-circuit/coil-python/requirements.txt b/resonant-circuit/coil-python/requirements.txt
index 2b8edf2ba..814a5c7dc 100644
--- a/resonant-circuit/coil-python/requirements.txt
+++ b/resonant-circuit/coil-python/requirements.txt
@@ -1,3 +1,3 @@
 numpy >1, <2
-scipy
+scipy>=1.10,<2
 pyprecice~=3.0
diff --git a/tools/releasing/README.md b/tools/releasing/README.md
new file mode 100644
index 000000000..748d56e70
--- /dev/null
+++ b/tools/releasing/README.md
@@ -0,0 +1,33 @@
+# Releasing helpers
+
+## Python dependency reference files
+
+Each Python participant lists dependencies in its local `requirements.txt` using loose version ranges (for example `numpy >1, <2`, `pyprecice~=3.0`). Tutorial `run.sh` scripts install from these files as before.
+
+Next to each `requirements.txt`, a sibling `requirements-reference.txt` records the latest PyPI versions that satisfy those constraints at generation time. Use it for reproducible installs:
+
+```bash
+pip install -r requirements-reference.txt
+```
+
+This tool lives under `tools/releasing/` and depends on:
+
+```bash
+pip install -r tools/releasing/requirements.txt
+```
+
+Update reference files after changing `requirements.txt` files. By default, only files whose resolved package pins changed are rewritten (timestamps alone do not create a diff). Use `--all` to force a full refresh, or pass a path to limit the update to one directory:
+
+```bash
+python3 tools/releasing/update-requirements-reference.py
+python3 tools/releasing/update-requirements-reference.py path/to/participant
+python3 tools/releasing/update-requirements-reference.py --all
+python3 tools/releasing/update-requirements-reference.py --check
+python3 tools/releasing/update-requirements-reference.py --check --fail-on-outdated
+```
+
+`--check` fails when a sibling `requirements-reference.txt` is missing, and warns when pins are outdated. `--fail-on-outdated` turns outdated pins into errors (used for release PRs to `master`).
+
+Legacy FEniCS packages (for example `fenics-dolfin`) are installed from the system or PPA in several tutorials and appear in the reference files as non-PyPI dependencies.
+
+When preparing a release pull request to `master`, regenerate and commit the sibling `requirements-reference.txt` files so the pinned snapshots match the current tutorial constraints.
diff --git a/tools/releasing/requirements-reference.txt b/tools/releasing/requirements-reference.txt
new file mode 100644
index 000000000..be76b09e0
--- /dev/null
+++ b/tools/releasing/requirements-reference.txt
@@ -0,0 +1,7 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: tools/releasing/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+packaging==26.2
diff --git a/tools/releasing/requirements.txt b/tools/releasing/requirements.txt
new file mode 100644
index 000000000..748809f75
--- /dev/null
+++ b/tools/releasing/requirements.txt
@@ -0,0 +1 @@
+packaging
diff --git a/tools/releasing/update-requirements-reference.py b/tools/releasing/update-requirements-reference.py
new file mode 100644
index 000000000..972a22ae2
--- /dev/null
+++ b/tools/releasing/update-requirements-reference.py
@@ -0,0 +1,284 @@
+#!/usr/bin/env python3
+"""
+Update sibling requirements-reference.txt files from requirements.txt constraints.
+
+Scans every git-tracked requirements.txt in the repository, queries PyPI for the
+latest version satisfying each constraint, and writes a sibling
+requirements-reference.txt next to each file.
+
+Run from the repository root:
+  python3 tools/releasing/update-requirements-reference.py
+  python3 tools/releasing/update-requirements-reference.py --all
+  python3 tools/releasing/update-requirements-reference.py path/to/dir
+  python3 tools/releasing/update-requirements-reference.py --check
+  python3 tools/releasing/update-requirements-reference.py --check --fail-on-outdated
+"""
+from __future__ import annotations
+
+import argparse
+import json
+import re
+import subprocess
+import sys
+from datetime import datetime, timezone
+from pathlib import Path
+from urllib import error, request
+
+from packaging.requirements import Requirement
+from packaging.specifiers import SpecifierSet
+from packaging.utils import canonicalize_name
+from packaging.version import Version
+
+REPO_ROOT = Path(__file__).resolve().parent.parent.parent
+REFERENCE_NAME = "requirements-reference.txt"
+SCRIPT_RELATIVE = "tools/releasing/update-requirements-reference.py"
+# Empty by default: every tracked requirements.txt gets a sibling reference file.
+EXCLUDED_RELATIVE: set[str] = set()
+
+_PYPI_VERSIONS_CACHE: dict[str, list[Version]] = {}
+_RESOLVED_CACHE: dict[str, str | None] = {}
+
+_HEADER = """\
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by {script} — do not edit manually.
+# Source: {source}
+# Generated: {timestamp}
+
+"""
+
+
+def discover_requirements_files(path: Path | None = None) -> list[Path]:
+    """Return git-tracked requirements.txt files, optionally limited to a path."""
+    # The `--` separates git options from pathspecs (not a script flag).
+    result = subprocess.run(
+        ["git", "ls-files", "--", "**/requirements.txt"],
+        cwd=REPO_ROOT,
+        capture_output=True,
+        text=True,
+        check=True,
+    )
+    scope: Path | None = None
+    if path is not None:
+        scope = path if path.is_absolute() else (REPO_ROOT / path)
+        scope = scope.resolve()
+
+    files: list[Path] = []
+    for line in result.stdout.splitlines():
+        relative = line.strip()
+        if not relative or relative in EXCLUDED_RELATIVE:
+            continue
+        candidate = (REPO_ROOT / relative).resolve()
+        if scope is not None:
+            try:
+                candidate.relative_to(scope)
+            except ValueError:
+                continue
+        files.append(candidate)
+    return sorted(files)
+
+
+def reference_path_for(requirements_file: Path) -> Path:
+    return requirements_file.with_name(REFERENCE_NAME)
+
+
+def parse_requirement_line(line: str) -> str | None:
+    stripped = line.strip()
+    # Skip comments and pip requirement-file options (e.g. --extra-index-url).
+    if not stripped or stripped.startswith("#") or stripped.startswith("--"):
+        return None
+    if " #" in stripped:
+        stripped = stripped.split(" #", 1)[0].strip()
+    return stripped or None
+
+
+def fetch_pypi_versions(package_name: str) -> list[Version]:
+    canonical = canonicalize_name(package_name)
+    if canonical in _PYPI_VERSIONS_CACHE:
+        return _PYPI_VERSIONS_CACHE[canonical]
+
+    url = f"https://pypi.org/pypi/{package_name}/json"
+    req = request.Request(url, headers={"Accept": "application/json"})
+    try:
+        with request.urlopen(req, timeout=30) as response:
+            payload = json.load(response)
+    except error.HTTPError as exc:
+        if exc.code == 404:
+            return []
+        raise
+
+    versions: list[Version] = []
+    for version_str in payload.get("releases", {}):
+        try:
+            versions.append(Version(version_str))
+        except Exception:
+            continue
+    _PYPI_VERSIONS_CACHE[canonical] = versions
+    return versions
+
+
+def resolve_pypi_version(requirement: Requirement) -> str | None:
+    cache_key = str(requirement)
+    if cache_key in _RESOLVED_CACHE:
+        return _RESOLVED_CACHE[cache_key]
+
+    if requirement.url:
+        _RESOLVED_CACHE[cache_key] = None
+        return None
+
+    versions = fetch_pypi_versions(requirement.name)
+    if not versions:
+        _RESOLVED_CACHE[cache_key] = None
+        return None
+
+    specifier = requirement.specifier if str(requirement.specifier) else SpecifierSet()
+    compatible = [version for version in versions if specifier.contains(version, prereleases=False)]
+    if not compatible:
+        _RESOLVED_CACHE[cache_key] = None
+        return None
+    resolved = str(max(compatible))
+    _RESOLVED_CACHE[cache_key] = resolved
+    return resolved
+
+
+def format_resolved_requirement(requirement_line: str) -> str:
+    requirement = Requirement(requirement_line)
+    if requirement.url:
+        return requirement_line
+
+    resolved = resolve_pypi_version(requirement)
+    if resolved is None:
+        return f"# {requirement_line}  # non-PyPI (system/PPA or no matching PyPI version)"
+    return f"{requirement.name}=={resolved}"
+
+
+def generate_reference_text(requirements_file: Path, timestamp: str) -> str:
+    relative = requirements_file.relative_to(REPO_ROOT).as_posix()
+    sections: list[str] = [
+        _HEADER.format(script=SCRIPT_RELATIVE, source=relative, timestamp=timestamp)
+    ]
+
+    for line in requirements_file.read_text().splitlines():
+        stripped = line.strip()
+        if stripped.startswith("--"):
+            sections.append(line + "\n")
+            continue
+        requirement_line = parse_requirement_line(line)
+        if requirement_line is None:
+            continue
+        sections.append(format_resolved_requirement(requirement_line) + "\n")
+
+    return "".join(sections)
+
+
+def normalize_for_check(text: str) -> str:
+    """Ignore generation timestamp when comparing reference files."""
+    return re.sub(r"^# Generated: .*\n", "# Generated: <ignored>\n", text, count=1, flags=re.MULTILINE)
+
+
+def write_references(*, path: Path | None = None, write_all: bool = False) -> tuple[list[Path], list[Path]]:
+    timestamp = datetime.now(timezone.utc).strftime("%Y-%m-%dT%H:%M:%SZ")
+    written: list[Path] = []
+    skipped: list[Path] = []
+    for req_file in discover_requirements_files(path):
+        output = reference_path_for(req_file)
+        generated = generate_reference_text(req_file, timestamp)
+        if (
+            not write_all
+            and output.exists()
+            and normalize_for_check(output.read_text()) == normalize_for_check(generated)
+        ):
+            skipped.append(output)
+            continue
+        output.write_text(generated)
+        written.append(output)
+    return written, skipped
+
+
+def check_references(*, path: Path | None = None, fail_on_outdated: bool = False) -> int:
+    timestamp = datetime.now(timezone.utc).strftime("%Y-%m-%dT%H:%M:%SZ")
+    missing: list[str] = []
+    outdated: list[str] = []
+
+    files = discover_requirements_files(path)
+    for req_file in files:
+        output = reference_path_for(req_file)
+        relative = output.relative_to(REPO_ROOT).as_posix()
+        generated = generate_reference_text(req_file, timestamp)
+        if not output.exists():
+            missing.append(relative)
+            continue
+        if normalize_for_check(output.read_text()) != normalize_for_check(generated):
+            outdated.append(relative)
+
+    if missing:
+        print("ERROR: missing requirements-reference.txt files:", file=sys.stderr)
+        for entry in missing:
+            print(f"  - {entry}", file=sys.stderr)
+
+    if outdated:
+        label = "ERROR" if fail_on_outdated else "WARNING"
+        print(f"{label}: outdated requirements-reference.txt files:", file=sys.stderr)
+        for entry in outdated:
+            print(f"  - {entry}", file=sys.stderr)
+
+    if missing or outdated:
+        print(
+            f"Run: python3 {SCRIPT_RELATIVE}",
+            file=sys.stderr,
+        )
+
+    if missing or (outdated and fail_on_outdated):
+        return 1
+
+    if outdated:
+        print(f"OK: {len(files)} requirements-reference.txt file(s) present ({len(outdated)} outdated warning(s))")
+    else:
+        print(f"OK: {len(files)} requirements-reference.txt file(s) are up to date")
+    return 0
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(
+        description="Update sibling requirements-reference.txt files from PyPI"
+    )
+    parser.add_argument(
+        "path",
+        nargs="?",
+        type=Path,
+        help="Optional path to limit updates/checks to requirements.txt files under that directory",
+    )
+    parser.add_argument(
+        "--all",
+        action="store_true",
+        help="Rewrite all matching reference files even when package pins are unchanged",
+    )
+    parser.add_argument(
+        "--check",
+        action="store_true",
+        help="Check reference files: missing is an error; outdated is a warning unless --fail-on-outdated",
+    )
+    parser.add_argument(
+        "--fail-on-outdated",
+        action="store_true",
+        help="With --check, also exit 1 when reference files are outdated (for release PRs to master)",
+    )
+    args = parser.parse_args()
+
+    if args.fail_on_outdated and not args.check:
+        parser.error("--fail-on-outdated requires --check")
+
+    if args.check:
+        return check_references(path=args.path, fail_on_outdated=args.fail_on_outdated)
+
+    written, skipped = write_references(path=args.path, write_all=args.all)
+    for path in written:
+        print(f"Wrote {path.relative_to(REPO_ROOT).as_posix()}")
+    if skipped:
+        print(f"Skipped {len(skipped)} unchanged requirements-reference.txt file(s)")
+    print(f"Wrote {len(written)} requirements-reference.txt file(s)")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())
diff --git a/tools/tests/requirements-reference.txt b/tools/tests/requirements-reference.txt
new file mode 100644
index 000000000..cfc9b3561
--- /dev/null
+++ b/tools/tests/requirements-reference.txt
@@ -0,0 +1,8 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: tools/tests/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+jinja2==3.1.6
+pyyaml==6.0.3
diff --git a/turek-hron-fsi3/fluid-nutils/requirements-reference.txt b/turek-hron-fsi3/fluid-nutils/requirements-reference.txt
new file mode 100644
index 000000000..1d56af1c7
--- /dev/null
+++ b/turek-hron-fsi3/fluid-nutils/requirements-reference.txt
@@ -0,0 +1,13 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: turek-hron-fsi3/fluid-nutils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+setuptools==83.0.0
+nutils==9.2
+numpy==1.26.4
+pyprecice==3.4.0
+meshio==5.3.5
+gmsh==4.15.2
+matplotlib==3.11.0
diff --git a/turek-hron-fsi3/fluid-nutils/requirements.txt b/turek-hron-fsi3/fluid-nutils/requirements.txt
index de8073acb..aaa8e67b7 100644
--- a/turek-hron-fsi3/fluid-nutils/requirements.txt
+++ b/turek-hron-fsi3/fluid-nutils/requirements.txt
@@ -1,7 +1,7 @@
-setuptools # required by nutils
+setuptools>=69.0.0  # required by nutils
 nutils~=9.0
 numpy >1, <2
 pyprecice~=3.0
-meshio
-gmsh
-matplotlib
+meshio>=5,<6
+gmsh>=4,<5
+matplotlib>=3,<4
diff --git a/turek-hron-fsi3/solid-nutils/requirements-reference.txt b/turek-hron-fsi3/solid-nutils/requirements-reference.txt
new file mode 100644
index 000000000..787be3ae5
--- /dev/null
+++ b/turek-hron-fsi3/solid-nutils/requirements-reference.txt
@@ -0,0 +1,13 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: turek-hron-fsi3/solid-nutils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+setuptools==83.0.0
+nutils==9.2
+numpy==1.26.4
+pyprecice==3.4.0
+meshio==5.3.5
+gmsh==4.15.2
+matplotlib==3.11.0
diff --git a/turek-hron-fsi3/solid-nutils/requirements.txt b/turek-hron-fsi3/solid-nutils/requirements.txt
index de8073acb..aaa8e67b7 100644
--- a/turek-hron-fsi3/solid-nutils/requirements.txt
+++ b/turek-hron-fsi3/solid-nutils/requirements.txt
@@ -1,7 +1,7 @@
-setuptools # required by nutils
+setuptools>=69.0.0  # required by nutils
 nutils~=9.0
 numpy >1, <2
 pyprecice~=3.0
-meshio
-gmsh
-matplotlib
+meshio>=5,<6
+gmsh>=4,<5
+matplotlib>=3,<4
diff --git a/two-scale-heat-conduction/macro-nutils/requirements-reference.txt b/two-scale-heat-conduction/macro-nutils/requirements-reference.txt
new file mode 100644
index 000000000..6da67fbc8
--- /dev/null
+++ b/two-scale-heat-conduction/macro-nutils/requirements-reference.txt
@@ -0,0 +1,10 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: two-scale-heat-conduction/macro-nutils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+setuptools==83.0.0
+nutils==7.3
+numpy==1.26.4
+pyprecice==3.4.0
diff --git a/two-scale-heat-conduction/macro-nutils/requirements.txt b/two-scale-heat-conduction/macro-nutils/requirements.txt
index 7ff7b5aa1..f22e7ac25 100644
--- a/two-scale-heat-conduction/macro-nutils/requirements.txt
+++ b/two-scale-heat-conduction/macro-nutils/requirements.txt
@@ -1,4 +1,4 @@
-setuptools # required by nutils
+setuptools>=69.0.0  # required by nutils
 nutils~=7.3
 numpy >1, <2
 pyprecice~=3.0
diff --git a/two-scale-heat-conduction/micro-nutils/requirements-reference.txt b/two-scale-heat-conduction/micro-nutils/requirements-reference.txt
new file mode 100644
index 000000000..d92e07e20
--- /dev/null
+++ b/two-scale-heat-conduction/micro-nutils/requirements-reference.txt
@@ -0,0 +1,11 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: two-scale-heat-conduction/micro-nutils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+setuptools==83.0.0
+nutils==7.3
+numpy==1.26.4
+pyprecice==3.4.0
+# micro-manager-precice>=0.11  # non-PyPI (system/PPA or no matching PyPI version)
diff --git a/two-scale-heat-conduction/micro-nutils/requirements.txt b/two-scale-heat-conduction/micro-nutils/requirements.txt
index 6bcbfdaff..6d9aaf9dd 100644
--- a/two-scale-heat-conduction/micro-nutils/requirements.txt
+++ b/two-scale-heat-conduction/micro-nutils/requirements.txt
@@ -1,5 +1,5 @@
-setuptools # required by nutils
+setuptools>=69.0.0  # required by nutils
 nutils~=7.3
 numpy >1, <2
 pyprecice~=3.0
-micro-manager-precice
+micro-manager-precice>=0.11
diff --git a/volume-coupled-diffusion/solver-fenics/requirements-reference.txt b/volume-coupled-diffusion/solver-fenics/requirements-reference.txt
new file mode 100644
index 000000000..a656561a8
--- /dev/null
+++ b/volume-coupled-diffusion/solver-fenics/requirements-reference.txt
@@ -0,0 +1,13 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: volume-coupled-diffusion/solver-fenics/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+fenicsprecice==2.3.0
+numpy==1.26.4
+fenics-dijitso==2019.1.0
+# fenics-dolfin~=2019.0  # non-PyPI (system/PPA or no matching PyPI version)
+fenics-ffc==2019.1.0.post0
+fenics-fiat==2019.1.0
+fenics-ufl-legacy==2022.3.0
diff --git a/volume-coupled-flow/source-nutils/requirements-reference.txt b/volume-coupled-flow/source-nutils/requirements-reference.txt
new file mode 100644
index 000000000..473c54e55
--- /dev/null
+++ b/volume-coupled-flow/source-nutils/requirements-reference.txt
@@ -0,0 +1,10 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: volume-coupled-flow/source-nutils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+setuptools==83.0.0
+nutils==7.3
+numpy==1.26.4
+pyprecice==3.4.0
diff --git a/volume-coupled-flow/source-nutils/requirements.txt b/volume-coupled-flow/source-nutils/requirements.txt
index 7ff7b5aa1..f22e7ac25 100644
--- a/volume-coupled-flow/source-nutils/requirements.txt
+++ b/volume-coupled-flow/source-nutils/requirements.txt
@@ -1,4 +1,4 @@
-setuptools # required by nutils
+setuptools>=69.0.0  # required by nutils
 nutils~=7.3
 numpy >1, <2
 pyprecice~=3.0
diff --git a/water-hammer/fluid1d-left-nutils/requirements-reference.txt b/water-hammer/fluid1d-left-nutils/requirements-reference.txt
new file mode 100644
index 000000000..a84c27beb
--- /dev/null
+++ b/water-hammer/fluid1d-left-nutils/requirements-reference.txt
@@ -0,0 +1,12 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: water-hammer/fluid1d-left-nutils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+setuptools==83.0.0
+nutils==9.2
+numpy==1.26.4
+pyprecice==3.4.0
+matplotlib==3.11.0
+treelog==1.0
diff --git a/water-hammer/fluid1d-left-nutils/requirements.txt b/water-hammer/fluid1d-left-nutils/requirements.txt
index 721a30444..a7b48c7ac 100644
--- a/water-hammer/fluid1d-left-nutils/requirements.txt
+++ b/water-hammer/fluid1d-left-nutils/requirements.txt
@@ -1,6 +1,6 @@
-setuptools # required by nutils
+setuptools>=69.0.0  # required by nutils
 nutils~=9.0
 numpy >1, <2
 pyprecice~=3.0
-matplotlib
-treelog
\ No newline at end of file
+matplotlib>=3,<4
+treelog>=1,<2
\ No newline at end of file
diff --git a/water-hammer/fluid1d-right-nutils/requirements-reference.txt b/water-hammer/fluid1d-right-nutils/requirements-reference.txt
new file mode 100644
index 000000000..c2d237ad0
--- /dev/null
+++ b/water-hammer/fluid1d-right-nutils/requirements-reference.txt
@@ -0,0 +1,12 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: water-hammer/fluid1d-right-nutils/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+setuptools==83.0.0
+nutils==9.2
+numpy==1.26.4
+pyprecice==3.4.0
+matplotlib==3.11.0
+treelog==1.0
diff --git a/water-hammer/fluid1d-right-nutils/requirements.txt b/water-hammer/fluid1d-right-nutils/requirements.txt
index 721a30444..a7b48c7ac 100644
--- a/water-hammer/fluid1d-right-nutils/requirements.txt
+++ b/water-hammer/fluid1d-right-nutils/requirements.txt
@@ -1,6 +1,6 @@
-setuptools # required by nutils
+setuptools>=69.0.0  # required by nutils
 nutils~=9.0
 numpy >1, <2
 pyprecice~=3.0
-matplotlib
-treelog
\ No newline at end of file
+matplotlib>=3,<4
+treelog>=1,<2
\ No newline at end of file
diff --git a/wolf-sheep-soil-creep/soil-creep-landlab/requirements-reference.txt b/wolf-sheep-soil-creep/soil-creep-landlab/requirements-reference.txt
new file mode 100644
index 000000000..dcd1bfa30
--- /dev/null
+++ b/wolf-sheep-soil-creep/soil-creep-landlab/requirements-reference.txt
@@ -0,0 +1,10 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: wolf-sheep-soil-creep/soil-creep-landlab/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==1.26.4
+matplotlib==3.11.0
+landlab==2.11.0
+pyprecice==3.4.0
diff --git a/wolf-sheep-soil-creep/soil-creep-landlab/requirements.txt b/wolf-sheep-soil-creep/soil-creep-landlab/requirements.txt
index 16efd4ddd..99da7bae0 100644
--- a/wolf-sheep-soil-creep/soil-creep-landlab/requirements.txt
+++ b/wolf-sheep-soil-creep/soil-creep-landlab/requirements.txt
@@ -1,4 +1,4 @@
 numpy >1, <2
-matplotlib
-landlab
+matplotlib>=3,<4
+landlab>=2.0,<3
 pyprecice~=3.0
diff --git a/wolf-sheep-soil-creep/wolf-sheep-grass-mesa/requirements-reference.txt b/wolf-sheep-soil-creep/wolf-sheep-grass-mesa/requirements-reference.txt
new file mode 100644
index 000000000..1420213ce
--- /dev/null
+++ b/wolf-sheep-soil-creep/wolf-sheep-grass-mesa/requirements-reference.txt
@@ -0,0 +1,11 @@
+# Pinned Python dependency versions for this tutorial participant.
+# Reference only: run scripts keep using loose requirements.txt constraints.
+# Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
+# Source: wolf-sheep-soil-creep/wolf-sheep-grass-mesa/requirements.txt
+# Generated: 2026-07-13T16:48:40Z
+
+numpy==1.26.4
+matplotlib==3.11.0
+mesa==3.5.1
+pyprecice==3.4.0
+networkx==3.6.1
diff --git a/wolf-sheep-soil-creep/wolf-sheep-grass-mesa/requirements.txt b/wolf-sheep-soil-creep/wolf-sheep-grass-mesa/requirements.txt
index f9ccca730..686df1c96 100644
--- a/wolf-sheep-soil-creep/wolf-sheep-grass-mesa/requirements.txt
+++ b/wolf-sheep-soil-creep/wolf-sheep-grass-mesa/requirements.txt
@@ -1,5 +1,5 @@
 numpy >1, <2
-matplotlib
-mesa>=3
+matplotlib>=3,<4
+mesa>=3,<4
 pyprecice~=3.0
-networkx
+networkx>=3,<4