diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index b1f83c7..485df22 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.9, 3.10]
+        python-version: ["3.9", "3.10"]
         os: [ubuntu-latest, macOS-latest]
 
     steps: