diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index bf2ed2e..0c03200 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -139,6 +139,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: 3.x
       - name: Build sdist
         uses: PyO3/maturin-action@v1
         with: