diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 86c8f58..6634def 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -8,7 +8,14 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11', 'pypy-3.7-v7.3.3']
+        python-version:
+        - '3.7'
+        - '3.8'
+        - '3.9'
+        - '3.10'
+        - '3.11'
+        - '3.12-dev'
+        - 'pypy-3.7-v7.3.3'
     steps:
     - name: Check out source code
       uses: actions/checkout@v2