diff --git a/.github/workflows/unittests.yaml b/.github/workflows/unittests.yaml
index 52cdd87..b4d0193 100644
--- a/.github/workflows/unittests.yaml
+++ b/.github/workflows/unittests.yaml
@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: [3.8, 3.9, 3.10, 3.11]
+        python-version: ["3.8", "3.9", "3.10", "3.11"]
 
     steps:
     - name: Checkout