diff --git a/.github/workflows/ci-pip-install-and-test-gpu.yml b/.github/workflows/ci-pip-install-and-test-gpu.yml
index b05b2ecf..dab7b060 100644
--- a/.github/workflows/ci-pip-install-and-test-gpu.yml
+++ b/.github/workflows/ci-pip-install-and-test-gpu.yml
@@ -13,6 +13,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
 
+      - name: Set up Python 3.9
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.9
+
       - name: Install torch (GPU CUDA 12.1)
         run: |
           python -m pip install torch  --index-url https://download.pytorch.org/whl/cu121