diff --git a/.github/workflows/auto_merge.yml b/.github/workflows/auto_merge.yml
new file mode 100644
index 0000000..651993c
--- /dev/null
+++ b/.github/workflows/auto_merge.yml
@@ -0,0 +1,28 @@
+name: Dependabot auto-merge
+on: pull_request
+
+permissions:
+  contents: write
+  pull-requests: write
+  issues: write
+  repository-projects: write
+
+jobs:
+  dependabot:
+    runs-on: ubuntu-latest
+    # Pull Requestを開いたユーザーがdependabotの場合のみ実行する
+    if: github.actor == 'dependabot[bot]'
+    steps:
+      - name: Dependabot metadata
+        id: metadata
+        uses: dependabot/fetch-metadata@v1
+        with:
+          github-token: "${{ secrets.GITHUB_TOKEN }}"
+      - name: Enable auto-merge for Dependabot PRs
+        if: contains(steps.metadata.outputs.dependency-names, 'my-dependency') && steps.metadata.outputs.update-type == 'version-update:semver-patch'
+        run: | 
+          gh pr edit "$PR_URL" --add-label "auto merge"
+          gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GH_TOKEN: ${{secrets.GITHUB_TOKEN}}