diff --git a/composer.json b/composer.json
index 77117b30..fa9eb0ee 100644
--- a/composer.json
+++ b/composer.json
@@ -8,7 +8,7 @@
     },
     "require-dev": {
         "phpstan/extension-installer": "^1.3",
-        "phpstan/phpstan": "^2.0",
+        "phpstan/phpstan": "^2.1.8",
         "phpstan/phpstan-webmozart-assert": "^2.0",
         "phpunit/phpunit": "^11.4",
         "rector/rector-src": "dev-main",
diff --git a/rules/DowngradePhp72/Rector/ClassMethod/DowngradeParameterTypeWideningRector.php b/rules/DowngradePhp72/Rector/ClassMethod/DowngradeParameterTypeWideningRector.php
index 1ba3e040..6aa01b34 100644
--- a/rules/DowngradePhp72/Rector/ClassMethod/DowngradeParameterTypeWideningRector.php
+++ b/rules/DowngradePhp72/Rector/ClassMethod/DowngradeParameterTypeWideningRector.php
@@ -231,7 +231,7 @@ private function isSafeType(ClassReflection $classReflection, ClassMethod $class
                 continue;
             }
 
-            if ($classReflection->isSubclassOf($unsafeType)) {
+            if ($classReflection->is($unsafeType)) {
                 return false;
             }
 
diff --git a/src/PhpDocDecorator/PhpDocFromTypeDeclarationDecorator.php b/src/PhpDocDecorator/PhpDocFromTypeDeclarationDecorator.php
index a2cba62e..c3918105 100644
--- a/src/PhpDocDecorator/PhpDocFromTypeDeclarationDecorator.php
+++ b/src/PhpDocDecorator/PhpDocFromTypeDeclarationDecorator.php
@@ -186,7 +186,7 @@ private function isRequireReturnTypeWillChange(ClassReflection $classReflection,
                 continue;
             }
 
-            if (! $classReflection->isSubclassOf($classMethodWillChangeReturnType->getClassName())) {
+            if (! $classReflection->is($classMethodWillChangeReturnType->getClassName())) {
                 continue;
             }