diff --git a/CHANGELOG.md b/CHANGELOG.md
index ca5261b0..8a90c602 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## v???
+
+### Features
+
+* Optional Builtin ConverseJS
+
 ## v0.0.8
 
 ### Features
diff --git a/conversejs/builtin.js b/conversejs/builtin.js
index 6881319f..be7b9cf3 100644
--- a/conversejs/builtin.js
+++ b/conversejs/builtin.js
@@ -1,3 +1,11 @@
+function inIframe () {
+  try {
+    return window.self !== window.top
+  } catch (e) {
+    return true
+  }
+}
+
 window.initConverse = function initConverse ({
   jid,
   assetsPath,
@@ -22,7 +30,7 @@ window.initConverse = function initConverse ({
     ],
     singleton: true,
     auto_focus: false,
-    hide_muc_participants: false,
+    hide_muc_participants: inIframe,
     keepalive: true,
     play_sounds: false,
     muc_mention_autocomplete_min_chars: 3,