diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 9edb82f..4b3a991 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -24,7 +24,7 @@ jobs:
     strategy:
       matrix:
         os: [ macOS-latest ]
-        python-version: [ 3.8, 3.9, 3.10 ]
+        python-version: [ "3.8", "3.9", "3.10" ]
 
     steps: