diff --git a/.github/workflows/pythonbuild.yml b/.github/workflows/pythonbuild.yml
index 8e769894e1a..330c95a7154 100644
--- a/.github/workflows/pythonbuild.yml
+++ b/.github/workflows/pythonbuild.yml
@@ -11,14 +11,14 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9, 3.10]
+        python-version: ["3.7", "3.8", "3.9", "3.10"]
         spark-version-suffix: ["", "-spark2"]
         exclude:
-        - python-version: 3.8
+        - python-version: "3.8"
           spark-version-suffix: "-spark2"
-        - python-version: 3.9
+        - python-version: "3.9"
           spark-version-suffix: "-spark2"
-        - python-version: 3.10
+        - python-version: "3.10"
           spark-version-suffix: "-spark2"
     steps:
     - uses: actions/checkout@v2