diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5475eb41b..20bfdd223 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -92,7 +92,7 @@ jobs:
       - name: Set up Python 3.10
         uses: actions/setup-python@v2
         with:
-          python-version: 3.10
+          python-version: "3.10"
       - name: generate cache key PY
         run:
           echo "PY=$((python -VV; pip freeze) | sha256sum | cut -d' ' -f1)" >>