diff --git a/.github/workflows/test-rector.yml b/.github/workflows/test-rector.yml
new file mode 100644
index 0000000..8eb4483
--- /dev/null
+++ b/.github/workflows/test-rector.yml
@@ -0,0 +1,78 @@
+# When a PR is opened or a push is made, perform
+# a static analysis check on the code using Rector.
+name: Rector
+
+on:
+  pull_request:
+    paths:
+      - 'app/**.php'
+      - 'tests/**.php'
+      - '.github/workflows/test-rector.yml'
+      - composer.json
+      - rector.php
+      - '**.neon.dist'
+
+  push:
+    paths:
+      - 'app/**.php'
+      - 'tests/**.php'
+      - '.github/workflows/test-rector.yml'
+      - composer.json
+      - rector.php
+      - '**.neon.dist'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    name: PHP ${{ matrix.php-versions }} Analyze code (Rector)
+    runs-on: ubuntu-22.04
+    strategy:
+      fail-fast: false
+      matrix:
+        php-versions: ['8.1', '8.2', '8.3']
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-versions }}
+          extensions: intl
+
+      - name: Use latest Composer
+        run: composer self-update
+
+      - name: Validate composer.json
+        run: composer validate --strict
+
+      - name: Get composer cache directory
+        run: echo "COMPOSER_CACHE_FILES_DIR=$(composer config cache-files-dir)" >> $GITHUB_ENV
+
+      - name: Cache dependencies
+        uses: actions/cache@v4
+        with:
+          path: ${{ env.COMPOSER_CACHE_FILES_DIR }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
+          restore-keys: ${{ runner.os }}-composer-
+
+      - name: Install dependencies
+        run: composer update --ansi --no-interaction
+
+      - name: Rector Cache
+        uses: actions/cache@v4
+        with:
+          path: /tmp/rector
+          key: ${{ runner.os }}-rector-${{ github.run_id }}
+          restore-keys: ${{ runner.os }}-rector-
+
+      - run: mkdir -p /tmp/rector
+
+      - name: Run static analysis
+        run: vendor/bin/rector process --dry-run --no-progress-bar
diff --git a/composer.json b/composer.json
index c7b0232..d3511b0 100644
--- a/composer.json
+++ b/composer.json
@@ -18,6 +18,7 @@
     "require-dev": {
         "fakerphp/faker": "^1.9",
         "mikey179/vfsstream": "^1.6",
+        "phpdevsr/rector-codeigniter4": "dev-main",
         "phpunit/phpunit": "^9.1"
     },
     "autoload": {
diff --git a/rector.php b/rector.php
new file mode 100644
index 0000000..cfc7a7f
--- /dev/null
+++ b/rector.php
@@ -0,0 +1,58 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * This file is part of PHPDevsr/recaptcha-codeigniter4.
+ *
+ * (c) 2023 Denny Septian Panggabean <xamidimura@gmail.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+use PHPDevsr\Rector\Codeigniter4\Set\CodeigniterSetList;
+use Rector\Caching\ValueObject\Storage\FileCacheStorage;
+use Rector\Config\RectorConfig;
+use Rector\DeadCode\Rector\ClassMethod\RemoveUnusedPromotedPropertyRector;
+use Rector\Php55\Rector\String_\StringClassNameToClassConstantRector;
+use Rector\Php73\Rector\FuncCall\JsonThrowOnErrorRector;
+use Rector\Php73\Rector\FuncCall\StringifyStrNeedlesRector;
+use Rector\Php80\Rector\Class_\AnnotationToAttributeRector;
+
+return RectorConfig::configure()
+    ->withSets([
+        CodeigniterSetList::CODEIGNITER_44,
+    ])
+    // auto import fully qualified class names
+    ->withImportNames(removeUnusedImports: true)
+    // The paths to refactor (can also be supplied with CLI arguments)
+    ->withPaths([
+        __DIR__ . '/app',
+        __DIR__ . '/tests',
+    ])
+    ->withParallel(120, 8, 10)
+    ->withCache('/tmp/rector', FileCacheStorage::class)
+    // Include Composer's autoload - required for global execution, remove if running locally
+    ->withAutoloadPaths([
+        __DIR__ . '/vendor/autoload.php',
+    ])
+    // Do you need to include constants, class aliases, or a custom autoloader?
+    ->withBootstrapFiles([
+        realpath(getcwd()) . '/vendor/codeigniter4/framework/system/Test/bootstrap.php',
+    ])
+    // Are there files or rules you need to skip?
+    ->withSkip([
+        __DIR__ . '/app/Views',
+
+        JsonThrowOnErrorRector::class,
+        StringifyStrNeedlesRector::class,
+
+        // Note: requires php 8
+        RemoveUnusedPromotedPropertyRector::class,
+
+        // May load view files directly when detecting classes
+        StringClassNameToClassConstantRector::class,
+
+        AnnotationToAttributeRector::class,
+    ]);