diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index ae92da8..64c537c 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -64,7 +64,7 @@ jobs:
         env:
           GH_PERSONAL_ACCESS_TOKEN: ${{ secrets.GH_PERSONAL_ACCESS_TOKEN }}
       - name: Update happycommits.json
-        uses: stefanzweifel/git-auto-commit-action@v4
+        uses: stefanzweifel/git-auto-commit-action@3ea6ae190baf489ba007f7c92608f33ce20ef04a #v4.16.0
         with:
           commit_message: update generated.json [skip actions]
           branch: deploy