diff --git a/config/module.config.php b/config/module.config.php
index 5595d7c..973e0a5 100644
--- a/config/module.config.php
+++ b/config/module.config.php
@@ -43,15 +43,15 @@
         ),
         'visitors' => array(
             'json' => array(
-                'options' => 0
+                'options' => 0,
             ),
             'xml' => array(
                 'doctype_whitelist' => array(),
+                'options' => 0,
             ),
             'serialization' => array(
                 'json' => 'jms_serializer.json_serialization_visitor',
                 'xml' => 'jms_serializer.xml_serialization_visitor',
-                'yml' => 'jms_serializer.yaml_serialization_visitor',
             ),
             'deserialization' => array(
                 'json' => 'jms_serializer.json_deserialization_visitor',
diff --git a/src/JMSSerializerModule/Metadata/Driver/LazyLoadingDriver.php b/src/JMSSerializerModule/Metadata/Driver/LazyLoadingDriver.php
index 3d5a83e..37cd4b8 100644
--- a/src/JMSSerializerModule/Metadata/Driver/LazyLoadingDriver.php
+++ b/src/JMSSerializerModule/Metadata/Driver/LazyLoadingDriver.php
@@ -2,6 +2,7 @@
 
 namespace JMSSerializerModule\Metadata\Driver;
 
+use Metadata\ClassMetadata;
 use Metadata\Driver\DriverInterface;
 use Zend\ServiceManager\ServiceLocatorInterface;
 
@@ -23,7 +24,7 @@ public function __construct(ServiceLocatorInterface $container, $realDriverId)
     /**
      * {@ineheritdoc}
      */
-    public function loadMetadataForClass(\ReflectionClass $class)
+    public function loadMetadataForClass(\ReflectionClass $class): ?ClassMetadata
     {
         return $this->serviceLocator->get($this->realDriverId)->loadMetadataForClass($class);
     }
diff --git a/src/JMSSerializerModule/Service/SerializerFactory.php b/src/JMSSerializerModule/Service/SerializerFactory.php
index e9a576b..872243e 100644
--- a/src/JMSSerializerModule/Service/SerializerFactory.php
+++ b/src/JMSSerializerModule/Service/SerializerFactory.php
@@ -24,11 +24,9 @@ public function createService(ServiceLocatorInterface $serviceLocator)
 
         return new Serializer(
             $serviceLocator->get('jms_serializer.metadata_factory'),
-            $serviceLocator->get('jms_serializer.handler_registry'),
-            $serviceLocator->get('jms_serializer.object_constructor'),
-            $this->buildMap($serviceLocator, $options->getSerialization()),
-            $this->buildMap($serviceLocator, $options->getDeserialization()),
-            $serviceLocator->get('jms_serializer.event_dispatcher')
+            array(),
+            $options->getSerialization(),
+            $options->getDeserialization()
         );
     }