diff --git a/static/js/main.js b/static/js/main.js
index 51a80ef..1f65f10 100644
--- a/static/js/main.js
+++ b/static/js/main.js
@@ -1,6 +1,8 @@
 (($) => {
+  const isSecure = location.protocol === "https:";
+  const port = location.port ? `:${location.port}` : "";
   var ws = new WebSocket(
-    `ws://${location.protocol + "//" + location.host}${location.port ? ":" + location.port : ""}/ws`,
+    `ws${isSecure ? "s" : ""}://${location.host}${port}/ws`,
   );
   const input = $("#message");
   const messages = $("#messages");