diff --git a/src/js/main.js b/src/js/main.js
index a0f7385..f8d38e3 100644
--- a/src/js/main.js
+++ b/src/js/main.js
@@ -6,6 +6,7 @@ window.favicon = new Favico({
 });
 
 $(function() {
+  let beep = new Audio('beep.mp3');
   let isActive = false;
   let newMessages = 0;
   let FADE_TIME = 150; // ms
@@ -301,6 +302,9 @@ $(function() {
     if (!isActive) {
       newMessages++;
       favicon.badge(newMessages);
+      if (beep) {
+        beep.play();
+      }
     }
     data.message = decrypt(data.message);
     addChatMessage(data);
diff --git a/src/public/beep.mp3 b/src/public/beep.mp3
new file mode 100644
index 0000000..738c24f
Binary files /dev/null and b/src/public/beep.mp3 differ