diff --git a/WePayV3/Contracts/BasicWePay.php b/WePayV3/Contracts/BasicWePay.php
index 80d4d17..317d6b9 100644
--- a/WePayV3/Contracts/BasicWePay.php
+++ b/WePayV3/Contracts/BasicWePay.php
@@ -229,7 +229,7 @@ abstract class BasicWePay
             $data['result'] = $aes->decryptToString(
                 $data['resource']['associated_data'],
                 $data['resource']['nonce'],
-                $data['resource']['algorithm']
+                $data['resource']['ciphertext']
             );
         }
         return $data;