diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 04434a2..033760b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.9, 3.10, 3.11, 3.12, 3.13]
+        python-version: [3.9, "3.10", "3.11", "3.12", "3.13"]
 
     steps:
       - name: Checkout code