diff --git a/.github/workflows/mkdocs.yml b/.github/workflows/mkdocs.yml
index dbeb1e8521..a1cdf2ee1c 100644
--- a/.github/workflows/mkdocs.yml
+++ b/.github/workflows/mkdocs.yml
@@ -20,7 +20,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: "3.x"
+          python-version: "3.9"
           cache: "pip"
 
       - name: Install dependencies