diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 5362025..30fb44f 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -10,7 +10,7 @@ jobs:
   tests:
     strategy:
       matrix:
-        ruby-version: [2.6, 2.7, "3.0", 3.1, 3.2]
+        ruby-version: ["2.6", "2.7", "3.0", "3.1", "3.2"]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3