diff --git a/ServiceDefinition/Loader/AnnotationClassLoader.php b/ServiceDefinition/Loader/AnnotationClassLoader.php
index f545786..b4253e4 100644
--- a/ServiceDefinition/Loader/AnnotationClassLoader.php
+++ b/ServiceDefinition/Loader/AnnotationClassLoader.php
@@ -16,7 +16,7 @@ use BeSimple\SoapBundle\ServiceDefinition\Annotation;
 use Doctrine\Common\Annotations\Reader;
 
 use Symfony\Component\Config\Loader\LoaderInterface;
-use Symfony\Component\Config\Loader\LoaderResolver;
+use Symfony\Component\Config\Loader\LoaderResolverInterface;
 
 /**
  * AnnotationClassLoader loads ServiceDefinition from a PHP class and its methods.
@@ -183,16 +183,16 @@ class AnnotationClassLoader implements LoaderInterface
     /**
      * Sets the loader resolver.
      *
-     * @param LoaderResolver $resolver A LoaderResolver instance
+     * @param LoaderResolverInterface $resolver A LoaderResolverInterface instance
      */
-    public function setResolver(LoaderResolver $resolver)
+    public function setResolver(LoaderResolverInterface $resolver)
     {
     }
 
     /**
      * Gets the loader resolver.
      *
-     * @return LoaderResolver A LoaderResolver instance
+     * @return LoaderResolverInterface A LoaderResolverInterface instance
      */
     public function getResolver()
     {