diff --git a/src/DependencyInjection/PcmSearchExtension.php b/src/DependencyInjection/PcmSearchExtension.php
index ba9215a..8199e69 100644
--- a/src/DependencyInjection/PcmSearchExtension.php
+++ b/src/DependencyInjection/PcmSearchExtension.php
@@ -10,9 +10,9 @@ use Symfony\Component\DependencyInjection\Extension\PrependExtensionInterface;
 use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
 
-class PcmSearchExtension extends Extension implements PrependExtensionInterface
+final class PcmSearchExtension extends Extension implements PrependExtensionInterface
 {
-    public function prepend(ContainerBuilder $container)
+    public function prepend(ContainerBuilder $container): void
     {
         $container->loadFromExtension(
             'doctrine',
@@ -28,12 +28,10 @@ class PcmSearchExtension extends Extension implements PrependExtensionInterface
         );
     }
 
-    public function load(array $configs, ContainerBuilder $container)
+    public function load(array $configs, ContainerBuilder $container): void
     {
-        $loader = new YamlFileLoader(
-            $container,
-            new FileLocator(__DIR__.'/../../config')
-        );
+        $loader = new YamlFileLoader($container, new FileLocator(__DIR__.'/../../config'));
+
         $loader->load('services.yaml');
     }
 }