diff --git a/composer.json b/composer.json
index 07bc7f4..2797798 100644
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,7 @@
 {
   "name": "mondu/shopware6-payment",
   "description": "Mondu payment for Shopware 6",
-  "version": "1.4.0",
+  "version": "1.4.1",
   "type": "shopware-platform-plugin",
   "license": "proprietary",
   "authors": [
diff --git a/src/Components/MonduApi/Service/MonduClient.php b/src/Components/MonduApi/Service/MonduClient.php
index 4b19535..9f0642c 100644
--- a/src/Components/MonduApi/Service/MonduClient.php
+++ b/src/Components/MonduApi/Service/MonduClient.php
@@ -75,9 +75,9 @@ public function cancelOrder($orderUid): ?string
         return $response['order']['state'] ?? null;
     }
 
-    public function confirmOrder($orderUuid): ?string
+    public function confirmOrder($orderUuid, $data): ?string
     {
-        $response = $this->sendRequest('orders/'. $orderUuid .'/confirm', 'POST');
+        $response = $this->sendRequest('orders/'. $orderUuid .'/confirm', 'POST', $data);
 
         return $response['order']['state'] ?? null;
     }
diff --git a/src/Components/PaymentMethod/PaymentHandler/MonduHandler.php b/src/Components/PaymentMethod/PaymentHandler/MonduHandler.php
index 8c3be02..e721def 100644
--- a/src/Components/PaymentMethod/PaymentHandler/MonduHandler.php
+++ b/src/Components/PaymentMethod/PaymentHandler/MonduHandler.php
@@ -64,7 +64,12 @@ public function finalize(AsyncPaymentTransactionStruct $transaction, Request $re
         if ($paymentState === self::PAYMENT_STATE_SUCCESS) {
             $paymentOrderUuid = $request->query->get('order_uuid');
 
-            $confirmResponseState = $this->monduClient->setSalesChannelId($salesChannelContext->getSalesChannelId())->confirmOrder($paymentOrderUuid);
+            $confirmResponseState = $this->monduClient->setSalesChannelId(
+                $salesChannelContext->getSalesChannelId()
+            )->confirmOrder(
+                $paymentOrderUuid,
+                ['external_reference_id' => $transaction->getOrder()->getOrderNumber()]
+            );
 
             if (!$this->isOrderConfirmed($confirmResponseState)) {
                 throw new CustomerCanceledAsyncPaymentException(