diff --git a/src/Gateways/Saman/Saman.php b/src/Gateways/Saman/Saman.php
index b9bce8c..9c9e7cc 100644
--- a/src/Gateways/Saman/Saman.php
+++ b/src/Gateways/Saman/Saman.php
@@ -226,7 +226,7 @@ protected function purchaseViewParams(): array
             'method' => 'POST',
             'form_data' => [
                 'Token' => $this->getToken(),
-                'RedirectURL' => $this->getCallbackUrl(),
+                'RedirectURL' => $this->preparedCallbackUrl(),
             ],
         ];
     }