diff --git a/src/Transaction.php b/src/Transaction.php
index 17962cd..4df9813 100644
--- a/src/Transaction.php
+++ b/src/Transaction.php
@@ -247,6 +247,12 @@ public function valid()
                     $errors[] = Validator::set($params, 'pan') ? null : 'Credit card number not provided.';
                     $errors[] = Validator::set($params, 'expdate') ? null : 'Expiry date not provided.';
 
+                    break;
+                case 'res_update_cc':
+                    $errors[] = Validator::set($params, 'data_key') ? null : 'Data key not provided.';
+                    $errors[] = Validator::set($params, 'pan') ? null : 'Credit card number not provided.';
+                    $errors[] = Validator::set($params, 'expdate') ? null : 'Expiry date not provided.';
+
                     break;
                 default:
                     $errors[] = $params['type'].' is not a supported transaction type.';