diff --git a/src/Wallabag/UserBundle/Entity/User.php b/src/Wallabag/UserBundle/Entity/User.php
index ae12e5d54..d98ae76a5 100644
--- a/src/Wallabag/UserBundle/Entity/User.php
+++ b/src/Wallabag/UserBundle/Entity/User.php
@@ -25,7 +25,7 @@ use Wallabag\CoreBundle\Entity\Entry;
  * @UniqueEntity("email")
  * @UniqueEntity("username")
  */
-class User extends BaseUser implements TwoFactorInterface, TrustedComputerInterface, \Serializable
+class User extends BaseUser implements TwoFactorInterface, TrustedComputerInterface
 {
     /**
      * @var int
@@ -240,14 +240,4 @@ class User extends BaseUser implements TwoFactorInterface, TrustedComputerInterf
 
         return false;
     }
-
-    public function serialize()
-    {
-        return serialize($this->id);
-    }
-
-    public function unserialize($serialized)
-    {
-        $this->id = unserialize($serialized);
-    }
 }