diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ddb7f41..f22daf7 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -20,7 +20,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: 3.7
+        python-version: '3.7'
 
     - name: Install Poetry
       run: |
@@ -44,7 +44,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.8, 3.9, 3.10]
+        python-version: ['3.8', '3.9', '3.10']
 
     steps:
     - name: Checkout code