diff --git a/src/Serializer.php b/src/Serializer.php
index 72b8815..659aee6 100644
--- a/src/Serializer.php
+++ b/src/Serializer.php
@@ -26,10 +26,6 @@ public static function deserialize(string $jsonString, string $type)
     public static function getSerializer(): SerializerInterface
     {
         if (self::$serializer === null) {
-            if (!class_exists(AnnotationRegistry::class, false)) {
-                AnnotationRegistry::registerLoader('class_exists');
-            }
-
             $serializerBuilder = SerializerBuilder::create();
             $serializerBuilder->configureListeners(function (\JMS\Serializer\EventDispatcher\EventDispatcher $dispatcher
             ) {