diff --git a/.github/workflows/tox.yml b/.github/workflows/tox.yml
index 242ef9a1..9967a97a 100644
--- a/.github/workflows/tox.yml
+++ b/.github/workflows/tox.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.9]
+        python-version: [3.7]
     steps:
     - uses: actions/checkout@v1
     - name: Set up Python ${{ matrix.python-version }}