diff --git a/rector.php b/rector.php
index 0e7d2cd01..ca4c98259 100644
--- a/rector.php
+++ b/rector.php
@@ -4,8 +4,7 @@
 
 use Rector\CodeQuality\Rector\Class_\InlineConstructorDefaultToPropertyRector;
 use Rector\Config\RectorConfig;
-use Rector\Php73\Rector\FuncCall\JsonThrowOnErrorRector;
-use Rector\Php74\Rector\Closure\ClosureToArrowFunctionRector;
+use Rector\Php81\Rector\FuncCall\NullToStrictStringFuncCallArgRector;
 use Rector\Php81\Rector\Property\ReadOnlyPropertyRector;
 use Rector\Set\ValueObject\LevelSetList;
 
@@ -21,12 +20,11 @@
 
     // define sets of rules
     $rectorConfig->sets([
-        LevelSetList::UP_TO_PHP_80,
+        LevelSetList::UP_TO_PHP_81,
     ]);
 
     $rectorConfig->skip([
-        ClosureToArrowFunctionRector::class,
-        JsonThrowOnErrorRector::class,
+        NullToStrictStringFuncCallArgRector::class,
         ReadOnlyPropertyRector::class,
     ]);
 };