diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index b5a93507bb..d515c2fb65 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -105,7 +105,7 @@ jobs:
       # Install Python.
       - uses: actions/setup-python@v4
         with:
-          python-version: '3.6'
+          python-version: '3.9'
 
       - name: Install dependencies
         run: |