diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
index 80229fd9b..7ab440bab 100644
--- a/.github/workflows/pull_request.yml
+++ b/.github/workflows/pull_request.yml
@@ -30,7 +30,7 @@ jobs:
       - name: Setup up python
         uses: actions/setup-python@v4
         with:
-          python-version: 3.9
+          python-version: '3.11'
 
       - name: Install tox
         run: pip install tox
@@ -107,7 +107,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.8, 3.9]
+        python-version: ["3.8", "3.9", "3.10", "3.11"]
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -126,7 +126,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: '${{ matrix.python-version }}'
 
       - name: Install tox
         run: pip install tox
@@ -145,7 +145,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: 3.9
+          python-version: '3.11'
 
       - name: Install python dependencies
         run: pip install build