diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index d28bb431..04daa024 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -5,6 +5,9 @@ on:
     - cron: 0 0 * * *
   workflow_dispatch:
 
+env:
+  PYTHON_VERSION: "3.9"
+
 defaults:
   run:
     shell: 'bash -Eeuo pipefail -x {0}'
@@ -19,7 +22,7 @@ jobs:
           token: ${{ secrets.REPO_GHA_PAT }}
       - uses: actions/setup-python@v4
         with:
-          python-version: '3.11'
+          python-version: ${{ env.PYTHON_VERSION }}
       - name: Run update script
         uses: nick-fields/retry@v2
         with: