diff --git a/src/Client.php b/src/Client.php
index 9db12b4..2a876b0 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -148,7 +148,7 @@ private function mapResponse(string $key, array $value)
             case 'UserCompany':
                 return UserCompany::fromArray($value);
             case 'Id':
-                return Id::fromInteger($value['id']);
+                return Id::fromInteger($value['Id']);
             case 'CertificatePinned':
                 return Certificate::fromArray($value);
             case 'Payment':