diff --git a/.github/workflows/pr.yaml b/.github/workflows/pr.yaml
index 1d35611537..9b81ab7d82 100644
--- a/.github/workflows/pr.yaml
+++ b/.github/workflows/pr.yaml
@@ -83,7 +83,7 @@ jobs:
       package-name: pylibraft
       test-before-amd64: "pip install cupy-cuda11x"
       # On arm also need to install cupy from the specific webpage.
-      test-before-arm64: "pip install cupy-cuda11x -f https://pip.cupy.dev/aarch64"
+      test-before-arm64: "pip install 'cupy-cuda11x<12.0.0' -f https://pip.cupy.dev/aarch64"
       test-unittest: "python -m pytest -v ./python/pylibraft/pylibraft/test"
       test-smoketest: "python ./ci/wheel_smoke_test_pylibraft.py"
   wheel-build-raft-dask:
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index aa7ca21b5f..876c9a6722 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -40,7 +40,7 @@ jobs:
       sha: ${{ inputs.sha }}
       package-name: pylibraft
       test-before-amd64: "pip install cupy-cuda11x"
-      test-before-arm64: "pip install cupy-cuda11x -f https://pip.cupy.dev/aarch64"
+      test-before-arm64: "pip install 'cupy-cuda11x<12.0.0' -f https://pip.cupy.dev/aarch64"
       test-unittest: "python -m pytest -v ./python/pylibraft/pylibraft/test"
   wheel-tests-raft-dask:
     secrets: inherit