diff --git a/ci/requirements-pinned.txt b/ci/requirements-pinned.txt
index 54d7a3d9c2..8996170d01 100644
--- a/ci/requirements-pinned.txt
+++ b/ci/requirements-pinned.txt
@@ -2,4 +2,3 @@
 --find-links http://www.silx.org/pub/wheelhouse/
 
 # Placeholder for pinned packages used by CI
-Cython==3.2.6
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index 68a645e364..3b0c02d64d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,7 +43,7 @@ dependencies = [
 build-backend = 'mesonpy'
 requires = [
     'meson-python',
-    'cython>=3.1,<3.3',
+    'cython>=3.1',
 ]
 
 
@@ -98,7 +98,7 @@ dev = [
     'wheel',                                  # To build wheels
     'meson-python',
     'ninja',
-    'cython>=3.1,<3.3',
+    'cython>=3.1',
     "tomli>=1.0.0; python_version < '3.11'",  # For bootstrap.py and build_man_page.py
     'ruff',                                   # Formatting and linting
     'pyinstaller>=6.0.0; sys_platform == "win32"',