diff --git a/.github/actions/update-generated-files/action.yaml b/.github/actions/update-generated-files/action.yaml
deleted file mode 100644
index b782339d..00000000
--- a/.github/actions/update-generated-files/action.yaml
+++ /dev/null
@@ -1,7 +0,0 @@
-name: update-generated-files
-description: push if there is changed file(s)
-runs:
-  using: composite
-  steps:
-    - shell: bash
-      run: ${{ github.action_path }}/run.sh
diff --git a/.github/actions/update-generated-files/run.sh b/.github/actions/update-generated-files/run.sh
deleted file mode 100755
index 4a981ff3..00000000
--- a/.github/actions/update-generated-files/run.sh
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/bin/bash
-set -o pipefail
-set -eux
-
-status="$(git status --porcelain)"
-if [ -z "$status" ]; then
-  exit 0
-fi
-
-if [[ ${GITHUB_EVENT_NAME} != pull_request ]]; then
-  : ERROR: need to regenerate files manually
-  exit 1
-fi
-
-git config user.name 'github-actions[bot]'
-git config user.email '41898282+github-actions[bot]@users.noreply.github.com'
-git add .
-git status
-git commit -m update-generated-files
-git push origin "${GITHUB_HEAD_REF}"
diff --git a/.github/workflows/hello-world.yaml b/.github/workflows/hello-world.yaml
index 140dee2a..dadf622b 100644
--- a/.github/workflows/hello-world.yaml
+++ b/.github/workflows/hello-world.yaml
@@ -31,11 +31,10 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-yarn-
       - run: yarn
-      - run: yarn format-check
       - run: yarn lint
       - run: yarn test
 
-  build:
+  generate:
     runs-on: ubuntu-latest
     defaults:
       run:
@@ -53,12 +52,13 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-yarn-
       - run: yarn
+      - run: yarn format
       - run: yarn build
       - run: yarn package
-      - uses: ./.github/actions/update-generated-files
+      - uses: int128/update-generated-files-action@main
 
   e2e-test:
-    needs: [build]
+    needs: [generate]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2