diff --git a/.github/workflows/pur.yml b/.github/workflows/pur.yml
index 000bec70..e4511e7c 100644
--- a/.github/workflows/pur.yml
+++ b/.github/workflows/pur.yml
@@ -26,7 +26,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v2
         with:
-          python-version: '3.x'
+          python-version: '3.9'
       - name: Install Python tools
         run: |
           python -m pip install --upgrade pip setuptools wheel pur