diff --git a/web/app/models/HTML.php b/web/app/models/HTML.php
index 06ec512..6fbb6b3 100644
--- a/web/app/models/HTML.php
+++ b/web/app/models/HTML.php
@@ -210,9 +210,9 @@ class HTML {
 		}
 
 		$protocol = HTML::protocol($cfg['location']);
-		$url = '//'.UOJConfig::$data['web'][$cfg['location']]['host'];
+		$url = $protocol . '://' . UOJConfig::$data['web'][$cfg['location']]['host'];
 		if (HTML::port($cfg['location']) != HTML::standard_port($protocol)) {
-			$url .= ':'.HTML::port($cfg['location']);
+			$url .= ':' . HTML::port($cfg['location']);
 		}
 		if ($param) {
 			$url .= $path . '?' . HTML::query_string_encode($param);