diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index 4643903..a87e3b4 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -24,7 +24,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
         matrix:
-            python-version: [3.7, 3.8, 3.9, 3.10, 3.11]
+            python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
             os: [ubuntu-latest, windows-latest]
     steps:
     - uses: actions/checkout@v2