diff --git a/src/DataType/InstantPaymentNotification.php b/src/DataType/InstantPaymentNotification.php
index 1f466fb..e8f3d94 100644
--- a/src/DataType/InstantPaymentNotification.php
+++ b/src/DataType/InstantPaymentNotification.php
@@ -69,6 +69,18 @@ class InstantPaymentNotification extends ResponseBase implements JsonSerializabl
             }
         }
 
-        return $data;
+        $sortedData = array(
+            'salt' => $data['salt'],
+            'orderRef' => $data['orderRef'],
+            'method' => $data['method'],
+            'merchant' => $data['merchant'],
+            'finishDate' => $data['finishDate'],
+            'paymentDate' => $data['paymentDate'],
+            'transactionId' => $data['transactionId'],
+            'status' => $data['status'],
+            'receiveDate' => $data['receiveDate']
+          );
+          
+        return $sortedData;
     }
 }