diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
new file mode 100644
index 0000000..20f2eff
--- /dev/null
+++ b/.github/workflows/format.yml
@@ -0,0 +1,28 @@
+name: Continuous Integration
+
+# This action works only on pushes to the main branch
+on:
+  push:
+    branches:
+      - main
+      # for testing
+      - prettier-github-action-3
+
+jobs:
+  prettier:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          # Make sure the actual branch is checked out when running on pull requests
+          ref: ${{ github.head_ref }}
+
+      - name: Prettify code
+        uses: creyD/prettier_action@v4.3
+        with:
+          # This part is also where you can pass other options, for example:
+          prettier_options: "--write ."
+          commit_message: "Format code with prettier (https://prettier.io/)"
+          commit_description: "This commit was automatically generated by a GitHub Action (see .github/workflows/format.yml)."