diff --git a/.github/workflows/pythonapp.yml b/.github/workflows/pythonapp.yml
index e89136c..ee23137 100644
--- a/.github/workflows/pythonapp.yml
+++ b/.github/workflows/pythonapp.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.x']
+        python-version: ['3.9']
 
     steps:
     - uses: actions/checkout@v1