diff --git a/.github/workflows/automerge.yaml b/.github/workflows/automerge.yaml
index ba3804e8..9b620d82 100644
--- a/.github/workflows/automerge.yaml
+++ b/.github/workflows/automerge.yaml
@@ -15,7 +15,7 @@ jobs:
     steps:
       - id: automerge
         name: automerge
-        uses: "pascalgn/automerge-action@v0.16.4"
+        uses: "pascalgn/automerge-action@7961b8b5eec56cc088c140b56d864285eabd3f67" # v0.16.4
         env:
           GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
           UPDATE_RETRIES: 24