diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 6c3f52f..a71ece7 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -11,8 +11,8 @@ jobs:
 
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9, 3.10]
-
+        python-version: ['3.7', '3.8', '3.9', '3.10']
+  
     steps:
     - uses: actions/checkout@v2