diff --git a/admin/manage_users.php b/admin/manage_users.php
index 4e39212b..85635d66 100644
--- a/admin/manage_users.php
+++ b/admin/manage_users.php
@@ -725,7 +725,7 @@ function hesk_validateUserInfo($pass_required = 1, $redirect_to = './manage_user
         }
     }
 
-    if (strlen($myuser['signature']) > 255) {
+    if (strlen($myuser['signature']) > 1000) {
         $hesk_error_buffer .= '<li>' . $hesklang['signature_long'] . '</li>';
     }