diff --git a/src/Model/Fields/Payer/UserAgent.php b/src/Model/Fields/Payer/UserAgent.php
index 0e84c5b..f4ab7dd 100644
--- a/src/Model/Fields/Payer/UserAgent.php
+++ b/src/Model/Fields/Payer/UserAgent.php
@@ -11,6 +11,6 @@ class UserAgent extends Field
 {
     protected $name = __CLASS__;
     protected $type = self::STRING;
-    protected $minLength = 3;
-    protected $maxLength = 600;
+    protected $minLength = 0;
+    protected $maxLength = 255;
 }