diff --git a/src/DependencyInjection/SonataBlockExtension.php b/src/DependencyInjection/SonataBlockExtension.php
index c871989b..e8572db3 100644
--- a/src/DependencyInjection/SonataBlockExtension.php
+++ b/src/DependencyInjection/SonataBlockExtension.php
@@ -19,9 +19,9 @@
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Extension\Extension;
 use Symfony\Component\DependencyInjection\Loader\PhpFileLoader;
 use Symfony\Component\DependencyInjection\Reference;
-use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 
 /**
  * @author Thomas Rabaix <thomas.rabaix@sonata-project.org>