diff --git a/html/index.html b/html/index.html
index ee0bc62..bfb1577 100644
--- a/html/index.html
+++ b/html/index.html
@@ -254,7 +254,7 @@ <h1>LEADERBOARD</h1>
         var connection = null;
         var serverUrl;
 
-        serverUrl = "ws://" + window.location.hostname +":"+ (parseInt(location.port) + 100);
+        serverUrl = "ws://" + window.location.hostname +":"+ (parseInt(window.location.port) + 100);
         connection = new WebSocket(serverUrl);
         
         connection.onopen = function (evt) {