diff --git a/readme.md b/readme.md
index 406a0ce..b44ad00 100644
--- a/readme.md
+++ b/readme.md
@@ -135,9 +135,9 @@ You can override services used internally, for example if you want to use a more
 ```yaml
 services:
     mycache:
-        class: Doctrine\Common\Cache\FilesystemCache
+        class: 'Doctrine\Common\Cache\FilesystemCache'
         arguments:
-            - '%kernel.cache_dir%/mycache'
+            $directory: '%kernel.cache_dir%/mycache'
 
     consistence.doctrine.enum.enum_fields_cache: '@mycache'
 ```
diff --git a/src/DependencyInjection/ConsistenceDoctrineExtension.php b/src/DependencyInjection/ConsistenceDoctrineExtension.php
index 9433124..40e2571 100644
--- a/src/DependencyInjection/ConsistenceDoctrineExtension.php
+++ b/src/DependencyInjection/ConsistenceDoctrineExtension.php
@@ -46,7 +46,7 @@ public function prepend(ContainerBuilder $container): void
 	public function load(array $configs, ContainerBuilder $container): void
 	{
 		$loader = new YamlFileLoader($container, new FileLocator(__DIR__ . '/config'));
-		$loader->load('services.yml');
+		$loader->load('services.yaml');
 	}
 
 	public function getAlias(): string
diff --git a/src/DependencyInjection/config/services.yaml b/src/DependencyInjection/config/services.yaml
new file mode 100644
index 0000000..774991d
--- /dev/null
+++ b/src/DependencyInjection/config/services.yaml
@@ -0,0 +1,15 @@
+services:
+    consistence.doctrine.enum.enum_post_load_entity_listener:
+        class: 'Consistence\Doctrine\Enum\EnumPostLoadEntityListener'
+        arguments:
+            $annotationReader: '@annotation_reader'
+            $enumFieldsCache: '@consistence.doctrine.enum.enum_fields_cache'
+        tags:
+            -
+                name: 'doctrine.event_listener'
+                event: 'postLoad'
+
+    consistence.doctrine.enum.enum_fields_cache: '@consistence.doctrine.enum.enum_fields_cache_default'
+
+    consistence.doctrine.enum.enum_fields_cache_default:
+        class: 'Doctrine\Common\Cache\ArrayCache'
diff --git a/src/DependencyInjection/config/services.yml b/src/DependencyInjection/config/services.yml
deleted file mode 100644
index 50798f7..0000000
--- a/src/DependencyInjection/config/services.yml
+++ /dev/null
@@ -1,13 +0,0 @@
-services:
-    consistence.doctrine.enum.enum_post_load_entity_listener:
-        class: Consistence\Doctrine\Enum\EnumPostLoadEntityListener
-        arguments:
-            - '@annotation_reader'
-            - '@consistence.doctrine.enum.enum_fields_cache'
-        tags:
-            - { name: doctrine.event_listener, event: postLoad }
-
-    consistence.doctrine.enum.enum_fields_cache: '@consistence.doctrine.enum.enum_fields_cache_default'
-
-    consistence.doctrine.enum.enum_fields_cache_default:
-        class: Doctrine\Common\Cache\ArrayCache