diff --git a/catalyst/api-bundle/Entity/User.php b/catalyst/api-bundle/Entity/User.php
index 55d49418..a55c88c6 100644
--- a/catalyst/api-bundle/Entity/User.php
+++ b/catalyst/api-bundle/Entity/User.php
@@ -14,7 +14,7 @@ use DateTime;
  * @ORM\Entity
  * @ORM\Table(name="api_user")
  */
-class User extends BaseUser implements UserInterface
+class User extends BaseUser
 {
      /**
      * @ORM\Id
diff --git a/src/Entity/User.php b/src/Entity/User.php
index 09c90e7c..c7304ef3 100644
--- a/src/Entity/User.php
+++ b/src/Entity/User.php
@@ -8,6 +8,7 @@ use Doctrine\ORM\Mapping as ORM;
 use Doctrine\Common\Collections\ArrayCollection;
 use Symfony\Component\Validator\Constraints as Assert;
 use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
+use Serializable;
 
 /**
  * @ORM\Entity
@@ -15,7 +16,7 @@ use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
  * @UniqueEntity("username")
  * @UniqueEntity("email")
  */
-class User extends BaseUser
+class User extends BaseUser implements Serializable
 {
     /**
      * @ORM\Id