diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 0cb3889..3ce16ba 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        version: [1.20]
+        version: ['1.20']
         pyver: ['3.8', '3.9', '3.10', '3.11']
     steps:
       - uses: actions/checkout@v2