diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 9c1b140..e69e840 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -28,7 +28,11 @@ jobs:
         python -m pip install --upgrade pip
         pip install pytest
         pip install -r requirements.txt -r tests/requirements.txt
-        python setup.py install
+    - name: Under Windows, install coincurve's missing `cffi` dependency
+      if: matrix.os == 'windows-latest'
+      run: pip install cffi
+    - name: Actually run the tests
+      run: python setup.py install
     - name: Test with pytest
       run: |
         pytest -vvv
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f944468..a0f29a4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,9 +1,12 @@
+# 3.5
+
+- Support Coincurve up to version 19. This version supports the latest libsecp.
+
 # 3.4
 
 - Support Coincurve up to version 18. This version includes support for BIP340 x-only keys and
   Schnorr signatures.
 
-
 # 3.3
 
 - Implement a pure Python fallback for RIPEMD160 in case `hashlib` does not provide it.
diff --git a/bip32/__init__.py b/bip32/__init__.py
index 475165a..c761904 100644
--- a/bip32/__init__.py
+++ b/bip32/__init__.py
@@ -1,7 +1,7 @@
 from .bip32 import BIP32, PrivateDerivationError, InvalidInputError
 from .utils import BIP32DerivationError, HARDENED_INDEX
 
-__version__ = "3.4"
+__version__ = "3.5"
 
 __all__ = [
     "BIP32",
diff --git a/requirements.txt b/requirements.txt
index 87c5b1c..b461dd0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
-coincurve>=15.0,<19
+coincurve>=15.0,<=19
 base58~=2.0