diff --git a/.github/workflows/ci-sage.yml b/.github/workflows/ci-sage.yml
index 44c0c2b3..19d1cc0e 100644
--- a/.github/workflows/ci-sage.yml
+++ b/.github/workflows/ci-sage.yml
@@ -60,8 +60,9 @@ env:
   TARGETS:     SAGE_CHECK=no SAGE_CHECK_PACKAGES="cysignals,cypari" cysignals cypari
   TARGETS_OPTIONAL: build/make/Makefile
   # Standard setting: Test the current beta release of Sage:
+  # Temporarily test with https://github.com/sagemath/sage/pull/36110
   SAGE_REPO:   sagemath/sage
-  SAGE_REF:    develop
+  SAGE_REF:    refs/pull/36110/merge
   REMOVE_PATCHES: "*"
 
 jobs:
@@ -159,13 +160,34 @@ jobs:
       targets:           SAGE_CHECK=no SAGE_CHECK_PACKAGES="cysignals,cypari" cysignals cypari
       targets_optional:  build/make/Makefile
       sage_repo:         sagemath/sage
-      sage_ref:          develop
+      sage_ref:          refs/pull/36110/merge
       upstream_artifact: upstream
       # We prefix the image name with the SPKG name ("cysignals-") to avoid the error
       # 'Package "sage-docker-..." is already associated with another repository.'
       docker_push_repository: ghcr.io/${{ github.repository }}/cysignals-
     needs: [dist, ubuntu-without-sage]
 
+  docker-sage-incremental:
+    uses: sagemath/sage/.github/workflows/docker.yml@develop
+    with:
+      # Build incrementally from published Docker image
+      incremental: true
+      free_disk_space: true
+      from_docker_repository: ghcr.io/sagemath/sage/
+      from_docker_target: "with-targets"
+      from_docker_tag: "dev"
+      docker_targets: "with-targets"
+      targets_pre:       build/make/Makefile
+      targets:           "cysignals-uninstall cypari-uninstall build doc-html ptest"
+      targets_optional:  build/make/Makefile
+      sage_repo:         sagemath/sage
+      sage_ref:          refs/pull/36110/merge
+      upstream_artifact: upstream
+      # We prefix the image name with the SPKG name ("cysignals-") to avoid the error
+      # 'Package "sage-docker-..." is already associated with another repository.'
+      docker_push_repository: ghcr.io/${{ github.repository }}/cysignals-
+    needs: [dist, ubuntu-without-sage, docker]
+
   macos-without-sage:
     runs-on: macos-latest
     strategy:
diff --git a/README.rst b/README.rst
index fdd68975..c87866cc 100644
--- a/README.rst
+++ b/README.rst
@@ -46,6 +46,7 @@ Changelog
 1.11.3 (not released yet)
 ^^^^^^^^^^^^^^^^^^^^^^^^^
 
+* Add support for Cython 3.
 * Replace `fprintf` by calls to `write`, which is async-signal-safe according to POSIX. [#162]
 * Introduce a general hook to interface with custom signal handling
 
diff --git a/pyproject.toml b/pyproject.toml
index eb1668b0..162900f5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,3 @@
 [build-system]
-requires = ['setuptools', 'Cython>=0.28, <3']
+requires = ['setuptools', 'Cython>=0.28']
 build-backend = "setuptools.build_meta"
diff --git a/requirements.txt b/requirements.txt
index c425e81e..19132679 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 setuptools
 wheel
-Cython>=0.28, <3
+Cython
 Sphinx
 flake8
diff --git a/setup.py b/setup.py
index 1923a876..e3745922 100755
--- a/setup.py
+++ b/setup.py
@@ -164,13 +164,17 @@ def cythonize(self, extensions):
         # Run Cython with -Werror on continuous integration services
         # with Python 3.6 or later
         from Cython.Compiler import Options
-        Options.warning_errors = True
+        Options.warning_errors = False
 
         from Cython.Build.Dependencies import cythonize
         return cythonize(extensions,
                 build_dir=cythonize_dir,
                 include_path=["src", os.path.join(cythonize_dir, "src")],
-                compiler_directives=dict(binding=True, language_level=2))
+                compiler_directives=dict(
+                    binding=True,
+                    language_level=2,
+                    legacy_implicit_noexcept=True,
+                    ))
 
 
 class build_py(_build_py):