diff --git a/README.md b/README.md
index 4f0a0190..4ee27f22 100644
--- a/README.md
+++ b/README.md
@@ -195,7 +195,7 @@ You can add multiple parameters, the violation will happen when none of them mat
 ```php
 $rules[] = Rule::allClasses()
     ->that(new ResideInOneOfTheseNamespaces('App\Controller'))
-    ->should(new HaveAttribute('AsController'))
+    ->should(new HaveAttribute('Symfony\Component\HttpKernel\Attribute\AsController'))
     ->because('it configures the service container');
 ```