diff --git a/.github/workflows/continuous.yml b/.github/workflows/continuous.yml
index 7eabfc5..f365008 100644
--- a/.github/workflows/continuous.yml
+++ b/.github/workflows/continuous.yml
@@ -7,7 +7,7 @@ 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']
 
     steps:
       - uses: actions/checkout@v2