diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index f6111c60..3f84e6a6 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -100,6 +100,8 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
+        with:
+          matrix.python-version: '3.9'
       - name: Run Linters
         run: |
           hatch run typing:test