diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 4eae62e..41ad42b 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -29,11 +29,11 @@ jobs:
     strategy:
       matrix:
         python-version:
-          - 3.8
-          - 3.9
-          - 3.10
-          - 3.11
-          - 3.12
+          - '3.8'
+          - '3.9'
+          - '3.10'
+          - '3.11'
+          - '3.12'
     steps:
       - name: Checkout
         uses: actions/checkout@v2