diff --git a/.github/workflows/docs-release.yml b/.github/workflows/docs-release.yml
index 46b57a2bc..2121e2711 100644
--- a/.github/workflows/docs-release.yml
+++ b/.github/workflows/docs-release.yml
@@ -80,6 +80,7 @@ jobs:
           push-to-fork: docker-tools-robot/docker.github.io
           commit-message: "vendor: github.com/docker/buildx ${{ env.RELEASE_NAME }}"
           signoff: true
+          sign-commits: true
           branch: dispatch/buildx-ref-${{ env.RELEASE_NAME }}
           delete-branch: true
           title: Update buildx reference to ${{ env.RELEASE_NAME }}