diff --git a/.github/workflows/autofix.yml b/.github/workflows/autofix.yml
new file mode 100644
index 0000000..9b4c18e
--- /dev/null
+++ b/.github/workflows/autofix.yml
@@ -0,0 +1,35 @@
+name: autofix.ci # For security reasons, the workflow in which the autofix.ci action is used must be named "autofix.ci".
+
+on:
+  pull_request:
+    types:
+      - opened
+      - synchronize
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  autofix:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repo
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js LTS
+        uses: actions/setup-node@v4
+        with:
+          node-version: lts/*
+          cache: yarn
+
+      - name: Install dependencies
+        run: yarn --immutable
+
+      - name: Format Codes
+        run: yarn format
+
+      - name: Apply autofix.ci
+        uses: autofix-ci/action@v1
+        with:
+          fail-fast: false
diff --git a/package.json b/package.json
index 2c5bad3..f2161eb 100644
--- a/package.json
+++ b/package.json
@@ -54,6 +54,7 @@
     "build:r": "r -f cjs",
     "build:ts": "tsc -b",
     "eslint": "ESLINT_USE_FLAT_CONFIG=false eslint",
+    "format": "prettier --write .",
     "lint": "run-p 'lint:*'",
     "lint:es": "eslint . --cache",
     "lint:tsc": "tsc -b --noEmit",