diff --git a/.github/workflows/tox.yml b/.github/workflows/tox.yml
index e0e95e66..0e1d582e 100644
--- a/.github/workflows/tox.yml
+++ b/.github/workflows/tox.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7]
+        python-version: [3.9]
     steps:
     - uses: actions/checkout@v1
     - name: Set up Python ${{ matrix.python-version }}
@@ -25,13 +25,13 @@ jobs:
         python -m pip install --upgrade pip
         pip install tox tox-gh-actions
     - name: Test with tox
-      run: tox -e py37-pytest
+      run: tox -e py39-pytest
 
   invalidcode:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7]
+        python-version: [3.9]
     steps:
     - uses: actions/checkout@v1
     - name: Set up Python ${{ matrix.python-version }}
@@ -43,4 +43,4 @@ jobs:
         python -m pip install --upgrade pip
         pip install tox tox-gh-actions
     - name: Linter
-      run: tox -e py37-invalidcode
+      run: tox -e py39-invalidcode