diff --git a/manager/Checker.php b/manager/Checker.php
index 1a7b85f..c3e2cc2 100644
--- a/manager/Checker.php
+++ b/manager/Checker.php
@@ -101,13 +101,9 @@
 					break;
 
 				case 'alphanumeric':
-				case 'user.username':
-				case 'group.name':
-					return $checker && is_string($value) && preg_match('/^[\w-]+$/i', $value);
+					return $checker && is_string($value) && preg_match('/^[\w\.-]+$/i', $value);
 					break;
 
-				case 'user.firstname':
-				case 'user.lastname':
 				case 'letters':
 					return $checker && is_string($value) && preg_match('/^[a-z -]+$/i', $value);
 					break;