diff --git a/src/Relationships/IRelationshipContainer.php b/src/Relationships/IRelationshipContainer.php
index <HASH>..<HASH> 100644
--- a/src/Relationships/IRelationshipContainer.php
+++ b/src/Relationships/IRelationshipContainer.php
@@ -10,12 +10,10 @@
 
 namespace Nextras\Orm\Relationships;
 
-use Countable;
-use IteratorAggregate;
 use Nextras\Orm\Entity\IEntity;
 
 
-interface IRelationshipContainer extends IteratorAggregate, Countable
+interface IRelationshipContainer
 {
 
 	/**
[relationships] fixed interface definition