diff --git a/.github/workflows/flake8.yml b/.github/workflows/flake8.yml
index 318e9683..bc62cbb3 100644
--- a/.github/workflows/flake8.yml
+++ b/.github/workflows/flake8.yml
@@ -18,7 +18,7 @@ jobs:
       - name: Set up Python 3.9
         uses: actions/setup-python@v2
         with:
-          python-version: 3.x
+          python-version: "3.9"
       - name: Run Flake8
         run: |
           pip install -r requirements.txt