diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2975688..6de7076 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.4.0] - 2026-05-07
+
 ### Added
 - Add `ScratchBackbone` for benchmarking DL models without pretrained weights. Only compatible with `FullFinetune` (enforced by the `Experiment` validator) ([#30](https://github.com/braindecode/OpenEEGBench/pull/30)).
 - Add `class_weight` parameter to `RidgeProbingTraining` (`"balanced"` or `None`); **default changed to `"balanced"`** — pass `None` for the previous unweighted behavior ([#32](https://github.com/braindecode/OpenEEGBench/pull/32)).
@@ -75,7 +77,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 Initial release.
 
-[Unreleased]: https://github.com/braindecode/OpenEEGBench/compare/v0.3.0...HEAD
+[Unreleased]: https://github.com/braindecode/OpenEEGBench/compare/v0.4.0...HEAD
+[0.4.0]: https://github.com/braindecode/OpenEEGBench/releases/tag/v0.4.0
 [0.3.0]: https://github.com/braindecode/OpenEEGBench/releases/tag/v0.3.0
 [0.2.1]: https://github.com/braindecode/OpenEEGBench/releases/tag/v0.2.1
 [0.2.0]: https://github.com/braindecode/OpenEEGBench/releases/tag/v0.2.0
diff --git a/CITATION.cff b/CITATION.cff
index 9686fc1..abbef61 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -37,8 +37,8 @@ authors:
     family-names: Delorme
     email: adelorme@ucsd.edu
     affiliation: "Swartz Center for Computational Neuroscience, Institute for Neural Computation, San Diego Supercomputer Center, University of California San Diego, USA; CNRS, France"
-version: 0.3.0
-date-released: "2026-04-22"
+version: 0.4.0
+date-released: "2026-05-07"
 identifiers:
   - type: doi
     value: 10.5281/zenodo.19698863
diff --git a/pyproject.toml b/pyproject.toml
index 760e74f..21a2220 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "open-eeg-bench"
-version = "0.3.0"
+version = "0.4.0"
 description = "Benchmarking parameter-efficient fine-tuning of EEG foundation models"
 readme = "README.md"
 requires-python = ">=3.11"
diff --git a/uv.lock b/uv.lock
index dbe2f11..3411a1e 100644
--- a/uv.lock
+++ b/uv.lock
@@ -2096,7 +2096,7 @@ wheels = [
 
 [[package]]
 name = "open-eeg-bench"
-version = "0.3.0"
+version = "0.4.0"
 source = { editable = "." }
 dependencies = [
     { name = "braindecode", extra = ["hub"] },