diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index dc47fb57..203d09c0 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -97,13 +97,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.10', '3.11', '3.12', '3.13']
-        gdal-version: ['3.11.4']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
+        gdal-version: ['3.11.5']
         include:
-          - python-version: '3.13'
+          - python-version: '3.14'
             gdal-version: 'latest'
-          - python-version: '3.9'
-            gdal-version: '3.11.4'
           - python-version: '3.9'
             gdal-version: '3.10.3'
           - python-version: '3.9'
@@ -159,7 +157,7 @@ jobs:
         # macos-15-intel is OSX Intel
         # macos-14 is OSX Arm64
         os: [macos-15-intel, macos-14]
-        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
         include:
           - os: ubuntu-latest
             python-version: '*'
diff --git a/pyproject.toml b/pyproject.toml
index c4f3e0f1..47c05c2c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,7 +2,7 @@
 requires = [
     "setuptools>=67.8",
     "wheel",
-    "cython~=3.0.2",
+    "cython~=3.1.0",
     "numpy>=2"
 ]
 build-backend = "setuptools.build_meta"
diff --git a/setup.py b/setup.py
index 92316c03..4f204654 100755
--- a/setup.py
+++ b/setup.py
@@ -207,9 +207,9 @@ elif cpp11_flag not in eca:
 cpp_ext_options['extra_compile_args'] = eca
 
 # Configure optional Cython coverage.
-cythonize_options = {"language_level": sys.version_info[0]}
+cythonize_options = {"language_level": sys.version_info[0], "compiler_directives": {"freethreading_compatible": True}}
 if os.environ.get('CYTHON_COVERAGE'):
-    cythonize_options['compiler_directives'] = {'linetrace': True}
+    cythonize_options['compiler_directives'].update(linetrace=True)
     cythonize_options['annotate'] = True
     ext_options['define_macros'].extend(
         [('CYTHON_TRACE', '1'), ('CYTHON_TRACE_NOGIL', '1')])
@@ -302,6 +302,7 @@ setup_args = dict(
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: 3.13",
+        "Programming Language :: Python :: 3.14",
         "Programming Language :: Python :: 3",
         "Topic :: Multimedia :: Graphics :: Graphics Conversion",
         "Topic :: Scientific/Engineering :: GIS",