diff --git a/Plugin/Api/RefundInvoice.php b/Plugin/Api/RefundInvoice.php
index 9804d64d..cfd67301 100644
--- a/Plugin/Api/RefundInvoice.php
+++ b/Plugin/Api/RefundInvoice.php
@@ -145,7 +145,7 @@ public function beforeRefund(
             }
 
             // Set the transaction id from response
-            $payment->setTransactionId($response->action_id);
+            $payment->setTransactionId($response['action_id']);
             $this->orderPaymentRepository->save($payment);
 
             $result = [$creditMemo, $order, $isOnline];