diff --git a/rector.php b/rector.php
new file mode 100644
index 0000000000..997e3ecd87
--- /dev/null
+++ b/rector.php
@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\Core\Configuration\Option;
+use Rector\Set\ValueObject\DowngradeSetList;
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $containerConfigurator): void {
+	// get parameters
+	$parameters = $containerConfigurator->parameters();
+
+	// paths to refactor; solid alternative to CLI arguments
+	$parameters->set(Option::PATHS, [
+		__DIR__ . '/src',
+		__DIR__ . '/include',
+		__DIR__ . '/mod',
+		__DIR__ . '/static',
+		__DIR__ . '/bin',
+		__DIR__ . '/addon',
+		__DIR__ . '/view',
+		__DIR__
+	]);
+
+	$parameters->set(Option::SKIP, [
+		__DIR__ . '/view/asset',
+	]);
+
+	// here we can define, what sets of rules will be applied
+	$parameters->set(Option::SETS, [
+		DowngradeSetList::PHP_73,
+		DowngradeSetList::PHP_72,
+		DowngradeSetList::PHP_71
+	]);
+
+	// is your PHP version different from the one your refactor to? [default: your PHP version]
+	$parameters->set(Option::PHP_VERSION_FEATURES, '7.0');
+};