diff --git a/src/Z38/SwissPayment/Message/CustomerCreditTransfer.php b/src/Z38/SwissPayment/Message/CustomerCreditTransfer.php
index a478112..4999fe4 100644
--- a/src/Z38/SwissPayment/Message/CustomerCreditTransfer.php
+++ b/src/Z38/SwissPayment/Message/CustomerCreditTransfer.php
@@ -90,7 +90,7 @@ public function getPaymentCount()
      */
     protected function getSchemaName()
     {
-        return 'http://www.six-interbank-clearing.com/de/pain.001.001.03.ch.02.xsd';
+        return 'urn:iso:std:iso:20022:tech:xsd:pain.001.001.03';
     }
 
     /**