diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index de507e9..ca4311b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.8, 3.9, 3.10, 3.11]
+        python-version: ['3.8', '3.9', '3.10', '3.11']
         include:
           - python-version: '3.12'
             coverage: 1