diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index a2409bb9ec8..ff7a23393b0 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -37,6 +37,7 @@ jobs:
           source fenicsx/bin/activate
           python -m pip install --upgrade setuptools
           python -m pip install --upgrade pip
+          python -m pip install Cython==0.29.32
           echo "VIRTUAL ENV:" $VIRTUAL_ENV
           echo '$(which python):' $(which python)
 
@@ -59,7 +60,7 @@ jobs:
             --download-ptscotch
           make all
           cd src/binding/petsc4py
-          PETSC_DIR=$GITHUB_WORKSPACE/petsc PETSC_ARCH=arch-darwin-c-opt pip3 install --no-cache-dir .
+          PETSC_DIR=$GITHUB_WORKSPACE/petsc PETSC_ARCH=arch-darwin-c-opt pip3 install --no-cache-dir -v .
 
       - name: Install Basix
         run: |
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 41cb50a08ca..4f9a23b4366 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -319,7 +319,8 @@ RUN apt-get -qq update && \
     make PETSC_DIR=/usr/local/petsc PETSC_ARCH=linux-gnu-complex-64 ${MAKEFLAGS} all && \
     # Install petsc4py
     cd src/binding/petsc4py && \
-    PETSC_ARCH=linux-gnu-real-32:linux-gnu-complex-32:linux-gnu-real-64:linux-gnu-complex-64 pip3 install --no-cache-dir . && \
+    pip3 install --no-cache-dir Cython==0.29.32 && \
+    PETSC_ARCH=linux-gnu-real-32:linux-gnu-complex-32:linux-gnu-real-64:linux-gnu-complex-64 pip3 install --no-cache-dir -v . && \
     # Cleanup
     apt-get -y purge bison flex && \
     apt-get -y autoremove && \