diff --git a/bin/server.js b/bin/server.js
index cb3508a..999c2ff 100755
--- a/bin/server.js
+++ b/bin/server.js
@@ -20,6 +20,7 @@ wss.on('connection', setupWSConnection)
 
 server.on('upgrade', (request, socket, head) => {
   // You may check auth of request here..
+  // See https://github.com/websockets/ws#client-authentication
   /**
    * @param {any} ws
    */