diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7a6cf26..a9b6878 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -103,10 +103,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Set up Python 3.7
+      - name: Set up Python 3.9
         uses: actions/setup-python@v1
         with:
-          python-version: 3.7
+          python-version: 3.9
       - name: Build source tarball
         run: python setup.py sdist
       - name: Publish package