diff --git a/template/advance/tpl/main.php b/template/advance/tpl/main.php
index 6392bbc..d9d228b 100755
--- a/template/advance/tpl/main.php
+++ b/template/advance/tpl/main.php
@@ -32,7 +32,7 @@ require_once 'rules.php';
                         <?php if (!get_config('battlenet_support')) { ?>
                             <div class="input-group">
                                 <span class="input-group"><?php elang('username'); ?></span>
-                                <input type="text" class="form-control" minlength="2" maxlength="16" pattern="_[a-zA-Z]+" required placeholder="<?php elang('username'); ?>"
+                                <input type="text" class="form-control" pattern="[A-Za-z]{2,16}" required placeholder="<?php elang('username'); ?>"
                                        name="username">
                             </div>
                         <?php } ?>