diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e53048c..5bbdedb 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -36,7 +36,7 @@ jobs:
           git config --global user.email 'ci@vdaas.org'
           git remote set-url origin https://${GITHUB_USER}:${GITHUB_TOKEN}@github.com/$GITHUB_REPOSITORY
           git add .
-          git commit -m "Update [vald sha: ${sha}]"
+          git commit -S -m "Update [vald sha: ${sha}]"
           git push
         env:
           GITHUB_USER: ${{ secrets.CI_USER }}