diff --git a/.github/workflows/pythonbuild.yml b/.github/workflows/pythonbuild.yml
index df303df..e426c1a 100644
--- a/.github/workflows/pythonbuild.yml
+++ b/.github/workflows/pythonbuild.yml
@@ -21,7 +21,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install pytest hypothesis mypy Cython==3.0.3
+          pip install pytest hypothesis mypy Cython==3.0.11
 
       # The cythonized files allow installation from the sdist without cython
       - name: Generate cython
diff --git a/HISTORY.md b/HISTORY.md
index 6bb47fb..a5e2668 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -5,6 +5,7 @@
 - add support for Python 3.13
 - drop support for Python 3.8
 - switch build system to `scikit-build-core`
+- upgrade to `Cython==3.0.11`
 
 ### v0.25.1
 #### Fixed
diff --git a/pyproject.toml b/pyproject.toml
index e1bae91..269f2a4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [build-system]
 requires = [
     "scikit-build-core>=0.10.6",
-    "Cython>=3.0.2,<3.1.0"
+    "Cython>=3.0.11,<3.1.0"
 ]
 build-backend = "scikit_build_core.build"
 
diff --git a/tools/sdist.patch b/tools/sdist.patch
index 8cbba9a..8ecdee1 100644
--- a/tools/sdist.patch
+++ b/tools/sdist.patch
@@ -6,7 +6,7 @@ index 0a8c033..cf967b9 100644
  [build-system]
  requires = [
 -    "scikit-build-core>=0.10.6",
--    "Cython>=3.0.2,<3.1.0"
+-    "Cython>=3.0.11,<3.1.0"
 +    "scikit-build-core>=0.10.6"
  ]
  build-backend = "scikit_build_core.build"