diff --git a/.github/workflows/python_ci.yml b/.github/workflows/python_ci.yml
index 968c5ccc..359c2ebf 100644
--- a/.github/workflows/python_ci.yml
+++ b/.github/workflows/python_ci.yml
@@ -4,12 +4,12 @@ jobs:
   python_run_scripts:
     strategy:
       matrix:
-        version: [3.9, 3.10, 3.11]
-    runs-on: ubuntu-latest
+        python: [3.9.12, 3.10.8, 3.11.10]
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v3
-      - name: setup python
+      - name: setup python ${{ matrix.python }}
         uses: actions/setup-python@v4
         with:
-          python-version: ${{ matrix.version }} # install the python version needed
+          python-version: ${{ matrix.python }} # install the python version needed
       - run: python install --editable ".[dev]"