diff --git a/src/ZfrPaymill/Client/ServiceDescription/Paymill-2.0.php b/src/ZfrPaymill/Client/ServiceDescription/Paymill-2.0.php
index 5ae1ee2..fa9dd48 100644
--- a/src/ZfrPaymill/Client/ServiceDescription/Paymill-2.0.php
+++ b/src/ZfrPaymill/Client/ServiceDescription/Paymill-2.0.php
@@ -34,7 +34,8 @@
         'code'  => 412
     ),
     array(
-        'class' => 'ZfrPaymill\Exception\ServerErrorException'
+        'class' => 'ZfrPaymill\Exception\ServerErrorException',
+        'code'  => 500
     )
 );
 
diff --git a/src/ZfrPaymill/Exception/ServerErrorException.php b/src/ZfrPaymill/Exception/ServerErrorException.php
index f0c29e4..f4cfb2d 100644
--- a/src/ZfrPaymill/Exception/ServerErrorException.php
+++ b/src/ZfrPaymill/Exception/ServerErrorException.php
@@ -16,9 +16,7 @@
  * and is licensed under the MIT license.
  */
 
-namespace ZfrPaymill;
-
-use ZfrPaymill\Exception\AbstractException;
+namespace ZfrPaymill\Exception;
 
 /**
  * @author  Michaël Gallego <mic.gallego@gmail.com>