diff --git a/.github/workflows/update-readme.yml b/.github/workflows/update-readme.yml
new file mode 100644
index 0000000..7759c8b
--- /dev/null
+++ b/.github/workflows/update-readme.yml
@@ -0,0 +1,25 @@
+name: Update README
+
+on:
+  workflow_dispatch:
+
+jobs:
+  update-readme:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0  # Fetch all history for all branches and tags
+
+      - name: Update README
+        run: |
+          echo -e "\nHoge" >> README.md
+
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v3
+        with:
+          commit-message: Add 'Hoge' to README
+          title: Add 'Hoge' to README
+          body: This PR adds 'Hoge' to the README.
+          branch: update-readme-${{ github.run_number }}