diff --git a/src/Bridge/Symfony/CocurSlugifyExtension.php b/src/Bridge/Symfony/CocurSlugifyExtension.php
index f8fd6510..c3ca7a6d 100644
--- a/src/Bridge/Symfony/CocurSlugifyExtension.php
+++ b/src/Bridge/Symfony/CocurSlugifyExtension.php
@@ -15,6 +15,7 @@
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\HttpKernel\DependencyInjection\Extension;
+use Symfony\Component\HttpKernel\Kernel;
 
 /**
  * CocurSlugifyExtension
@@ -57,5 +58,10 @@ public function load(array $configs, ContainerBuilder $container)
             ->addTag('twig.extension')
             ->setPublic(false);
         $container->setAlias('slugify', 'cocur_slugify');
+
+        // for symfony versions > 3.3
+        if (Kernel::VERSION_ID > 30300) {
+            $container->setAlias('Cocur\Slugify\Slugify', 'cocur_slugify');
+        }
     }
 }