diff --git a/rector.php b/rector.php
index 44602e993..11c077c8f 100644
--- a/rector.php
+++ b/rector.php
@@ -3,23 +3,24 @@
 use Rector\Config\RectorConfig;
 use Rector\Set\ValueObject\LevelSetList;
 use Rector\Set\ValueObject\SetList;
+use Rector\Php81\Rector\FuncCall\NullToStrictStringFuncCallArgRector;
 
-return static function (RectorConfig $rectorConfig): void {
-    $rectorConfig->paths([
+return RectorConfig::configure()
+	->withPaths([
 		__DIR__ . '/lam/help',
-        __DIR__ . '/lam/lib',
+		__DIR__ . '/lam/lib',
 		__DIR__ . '/lam/templates',
 		__DIR__ . '/lam/tests',
-    ]);
-
-    //$rectorConfig->fileExtensions(['php', 'inc']);
-
-    $rectorConfig->skip([
-        __DIR__ . '/lam/lib/3rdParty',
-    ]);
-
-    $rectorConfig->sets([
-        SetList::DEAD_CODE,
-		LevelSetList::UP_TO_PHP_80
-    ]);
-};
+	])
+	->withSets([
+		SetList::DEAD_CODE,
+		LevelSetList::UP_TO_PHP_81
+	])
+	->withSkip([
+		__DIR__ . '/lam/lib/3rdParty',
+		NullToStrictStringFuncCallArgRector::class
+	])
+	->withFileExtensions([
+		'php',
+//		'inc'
+	]);