diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 8fc21b0..94a5f0b 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -30,7 +30,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.9, 3.12]
+        python-version: ["3.9", "3.12"]
 
     steps:
       - name: Checkout