diff --git a/Build/rector/config.php b/Build/rector/config.php
index 1794970a..3b414059 100644
--- a/Build/rector/config.php
+++ b/Build/rector/config.php
@@ -22,16 +22,11 @@
         __DIR__ . '/../../ext_emconf.php',
         __DIR__ . '/../../ext_localconf.php',
     ])
-    ->withPhpVersion(PhpVersion::PHP_81)
     ->withPhpSets()
+    ->withComposerBased(phpunit: true)
     ->withSets([
         // Rector sets
 
-        LevelSetList::UP_TO_PHP_81,
-        // LevelSetList::UP_TO_PHP_82,
-        // LevelSetList::UP_TO_PHP_83,
-        // LevelSetList::UP_TO_PHP_84,
-
         // SetList::CODE_QUALITY,
         // SetList::CODING_STYLE,
         // SetList::DEAD_CODE,
@@ -42,12 +37,6 @@
         // SetList::STRICT_BOOLEANS,
         // SetList::TYPE_DECLARATION,
 
-        // PHPUnit sets
-
-        PHPUnitSetList::PHPUNIT_100,
-        // PHPUnitSetList::PHPUNIT_110,
-        // PHPUnitSetList::PHPUNIT_CODE_QUALITY,
-
         // TYPO3 Sets
         // https://github.com/sabbelasichon/typo3-rector/blob/main/src/Set/Typo3LevelSetList.php
         // https://github.com/sabbelasichon/typo3-rector/blob/main/src/Set/Typo3SetList.php