diff --git a/public/script.js b/public/script.js
index d0ed3e0..d70c765 100644
--- a/public/script.js
+++ b/public/script.js
@@ -21,7 +21,11 @@ let config = {};
 let ws = null;
 
 function tryConnect() {
-  let c = new WebSocket("ws://" + window.location.host);
+  let wsProtocol = 'ws://';
+  if (window.location.protocol === 'https:') {
+    wsProtocol = 'wss://';
+  }
+  let c = new WebSocket(wsProtocol + window.location.host);
   c.addEventListener('message', function (event) {
     handleMessage(JSON.parse(event.data));
   });