diff --git a/.github/workflows/code-check.yml b/.github/workflows/code-check.yml
index e9c99b9..e55f7e6 100644
--- a/.github/workflows/code-check.yml
+++ b/.github/workflows/code-check.yml
@@ -6,7 +6,7 @@ jobs:
   pre-commit:
     strategy:
       matrix:
-        python-version: [3.10, 3.11]
+        python-version: ['3.10', '3.11']
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2