diff --git a/.github/workflows/tox.yml b/.github/workflows/tox.yml
index 2c4cf7f5..1f53d1eb 100644
--- a/.github/workflows/tox.yml
+++ b/.github/workflows/tox.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.9]
+        python-version: [3.11]
     steps:
     - uses: actions/checkout@v1
     - name: Set up Python ${{ matrix.python-version }}
@@ -26,7 +26,7 @@ jobs:
         python -m pip install --upgrade pip
         pip install tox tox-gh-actions
     - name: Test with tox
-      run: tox -e py39-pytest
+      run: tox -e py311-pytest
 
   invalidcode:
     runs-on: ubuntu-latest
@@ -44,6 +44,6 @@ jobs:
         python -m pip install --upgrade pip
         pip install tox tox-gh-actions
     - name: Linter
-      run: tox -e py39-invalidcode
+      run: tox -e py311-invalidcode
     - name: Mypy
-      run: tox -e py39-mypy
+      run: tox -e py311-mypy