diff --git a/rector.php b/rector.php
index 50a29492..0a0674ad 100644
--- a/rector.php
+++ b/rector.php
@@ -2,45 +2,21 @@
 
 declare(strict_types=1);
 
-use Rector\CodeQuality\Rector\Array_\CallableThisArrayToAnonymousFunctionRector;
-use Rector\CodingStyle\Rector\ArrowFunction\StaticArrowFunctionRector;
-use Rector\CodingStyle\Rector\Closure\StaticClosureRector;
 use Rector\Config\RectorConfig;
 use Rector\Php81\Rector\Array_\FirstClassCallableRector;
-use Rector\Set\ValueObject\LevelSetList;
-use Rector\Set\ValueObject\SetList;
 use Rector\Strict\Rector\BooleanNot\BooleanInBooleanNotRuleFixerRector;
 
-return static function (RectorConfig $rectorConfig): void {
-    $rectorConfig->sets([
-        LevelSetList::UP_TO_PHP_81,
-        SetList::CODE_QUALITY,
-        SetList::CODING_STYLE,
-        SetList::DEAD_CODE,
-        SetList::NAMING,
-        SetList::PRIVATIZATION,
-        SetList::TYPE_DECLARATION,
-        SetList::STRICT_BOOLEANS,
-    ]);
-
-    $rectorConfig->parallel();
-    $rectorConfig->paths([__DIR__ . '/config', __DIR__ . '/src', __DIR__ . '/spec', __FILE__]);
-    $rectorConfig->importNames();
-    $rectorConfig->removeUnusedImports();
-    $rectorConfig->skip([
+return RectorConfig::configure()
+    ->withPhpSets()
+    ->withPreparedSets(codeQuality: true, codingStyle: true, deadCode: true, naming: true, privatization: true, typeDeclarations: true, strictBooleans: true)
+    ->withPaths([__DIR__ . '/config', __DIR__ . '/src', __DIR__ . '/spec', __FILE__])
+    ->withImportNames(removeUnusedImports: true)
+    ->withSkip([
         __DIR__ . '/src/Controller',
         __DIR__ . '/src/Command/Preview',
         __DIR__ . '/src/Middleware/Routed/Preview',
-        CallableThisArrayToAnonymousFunctionRector::class,
-        StaticArrowFunctionRector::class => [
-            __DIR__ . '/spec',
-        ],
-        StaticClosureRector::class       => [
-            __DIR__ . '/spec',
-        ],
         FirstClassCallableRector::class,
         BooleanInBooleanNotRuleFixerRector::class => [
             __DIR__ . '/src/Handler/Logging.php',
         ],
     ]);
-};
diff --git a/spec/Middleware/MezzioSpec.php b/spec/Middleware/MezzioSpec.php
index ad70a737..73dc3b4b 100644
--- a/spec/Middleware/MezzioSpec.php
+++ b/spec/Middleware/MezzioSpec.php
@@ -237,8 +237,8 @@
             allow($handler)->toReceive('handle')->with($this->request)->andReturn(new Response());
             $middleware = new Mezzio($config, $this->logging, $this->renderer);
 
-            $actual = $middleware->process($this->request, $handler);
-            expect($actual)->toBeAnInstanceOf(ResponseInterface::class);
+            $response = $middleware->process($this->request, $handler);
+            expect($response)->toBeAnInstanceOf(ResponseInterface::class);
 
         });
 
@@ -276,10 +276,10 @@
                 });
                 $middleware = new Mezzio($config, $logging, $this->renderer);
 
-                $actual = $middleware->process($this->request, $handler);
-                expect($actual)->toBeAnInstanceOf(Response::class);
+                $response = $middleware->process($this->request, $handler);
+                expect($response)->toBeAnInstanceOf(Response::class);
 
-                $content = $actual->getBody()->__toString();
+                $content = $response->getBody()->__toString();
                 expect($content)->toContain('<title>Error');
                 expect($content)->toContain('<p>We have encountered a problem and we can not fulfill your request');
 
@@ -335,9 +335,9 @@
                 });
                 $middleware = new Mezzio($config, $logging, null);
 
-                $actual = $middleware->process($request, $handler);
-                expect($actual)->toBeAnInstanceOf(Response::class);
-                expect($actual->getBody()->__toString())->toBe(<<<json
+                $response = $middleware->process($request, $handler);
+                expect($response)->toBeAnInstanceOf(Response::class);
+                expect($response->getBody()->__toString())->toBe(<<<json
 {
     "type": "http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html",
     "title": "Internal Server Error",
@@ -372,9 +372,9 @@
                 });
                 $middleware = new Mezzio($config, $logging, $this->renderer);
 
-                $actual = $middleware->process($request, $handler);
-                expect($actual)->toBeAnInstanceOf(Response::class);
-                expect($actual->getBody()->__toString())->toBe(<<<json
+                $response = $middleware->process($request, $handler);
+                expect($response)->toBeAnInstanceOf(Response::class);
+                expect($response->getBody()->__toString())->toBe(<<<json
 {
     "type": "http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html",
     "title": "Internal Server Error",