diff --git a/.github/workflows/.update-deps.yml b/.github/workflows/.update-deps.yml
index f5f7a5d..02713fd 100644
--- a/.github/workflows/.update-deps.yml
+++ b/.github/workflows/.update-deps.yml
@@ -327,6 +327,7 @@ jobs:
           commit-message: ${{ steps.update.outputs.commit-message }}
           title: ${{ steps.update.outputs.commit-message }}
           signoff: true
+          sign-commits: true
           delete-branch: true
           body: |
             This updates ${{ steps.update.outputs.key }} from ${{ steps.update.outputs.before-value }} to `${{ steps.update.outputs.target-value }}`.