diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4761de3a..dacbe1ab 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,9 +13,8 @@ jobs:
       DJANGO_SETTINGS_MODULE: babybuddy.settings.ci
       PIPENV_VENV_IN_PROJECT: enabled
     strategy:
-      max-parallel: 4
       matrix:
-        python-version: [ 3.6, 3.7, 3.8, 3.9, 3.10 ]
+        python-version: [ '3.6', '3.7', '3.8', '3.9', '3.10' ]
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python ${{ matrix.python-version }}