diff --git a/lib/Exception.php b/lib/Exception.php
index 0abdb08..8bdd115 100644
--- a/lib/Exception.php
+++ b/lib/Exception.php
@@ -12,6 +12,8 @@ class Exception extends \Exception {
     -32000 => 'ServerError',
      1006  => 'AccessDenied',
      9001  => 'ValidationFailed',
+     9002  => 'NormalizationFailed',
+     9003  => 'ObjectNotFound'
   );
 
   /**
diff --git a/lib/Exception/NormaizationFailed.php b/lib/Exception/NormaizationFailed.php
new file mode 100644
index 0000000..df210a6
--- /dev/null
+++ b/lib/Exception/NormaizationFailed.php
@@ -0,0 +1,6 @@
+<?php
+
+namespace Textalk\WebshopClient\Exception;
+use Textalk\WebshopClient\Exception;
+
+class NormalizationFailed extends Exception {}
diff --git a/lib/Exception/ObjectNotFound.php b/lib/Exception/ObjectNotFound.php
new file mode 100644
index 0000000..a823aea
--- /dev/null
+++ b/lib/Exception/ObjectNotFound.php
@@ -0,0 +1,6 @@
+<?php
+
+namespace Textalk\WebshopClient\Exception;
+use Textalk\WebshopClient\Exception;
+
+class ObjectNotFound extends Exception {}