diff --git a/ui/js/arena.js b/ui/js/arena.js
index b5f486d..b98b477 100644
--- a/ui/js/arena.js
+++ b/ui/js/arena.js
@@ -63,7 +63,12 @@ function loadCode() {
 }
 
 function wsurl() {
-    return "ws://" + window.location.host + "/ws/";
+    var url = "ws://";
+    if(window.location.protocol == "https:") {
+        url = "wss://";
+    }
+    url = url + window.location.host + "/ws/";
+    return url; 
 }
 
 function getGameID() {