diff --git a/src/Handler.php b/src/Handler.php
index 5f536b0..d81c1d5 100644
--- a/src/Handler.php
+++ b/src/Handler.php
@@ -62,10 +62,9 @@ class Handler implements RequestHandlerInterface
      * @param $reflectionType
      * @return string
      */
-    protected function returnType($reflectionType): string
+    protected function returnType(ReflectionMethod $reflectionType): string
     {
-        var_dump($reflectionType->getName());
-        return match ($reflectionType->getName()) {
+        return match ($reflectionType->getReturnType()->getName()) {
             'array'                 => ArrayFormat::class,
             'mixed', 'object'       => MixedFormat::class,
             'int', 'string', 'bool' => OtherFormat::class,