diff --git a/.github/workflows/create-pr-when-pr-is-merged.yml b/.github/workflows/create-pr-when-pr-is-merged.yml
index a8229115..8c799466 100644
--- a/.github/workflows/create-pr-when-pr-is-merged.yml
+++ b/.github/workflows/create-pr-when-pr-is-merged.yml
@@ -75,7 +75,7 @@ jobs:
         id: create_pr
         with:
           route: POST /repos/${{ github.repository }}/pulls
-          title: create pr for random update
+          title: "chore: create pr for random update"
           head: nakamasato:${{ env.BRANCH_NAME }}
           base: ${{ env.BASE_BRANCH_NAME }}
           body: | # https://github.com/octokit/request-action#inputs