diff --git a/lib/utils.js b/lib/utils.js
index 38fd0bb..cc97b10 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -15,11 +15,12 @@ const validateCallUpdate = (opts) => {
     mute_status,
     whisper,
     conf_hold_status,
-    sip_request
+    sip_request,
+    dub
   } = opts;
 
   assert.ok(call_hook || child_call_hook || call_status ||
-    listen_status || mute_status || whisper  ||
+    listen_status || mute_status || whisper  || dub ||
     conf_hold_status || sip_request, `calls.update: invalid request ${JSON.stringify(opts)}`);
 
   if (call_status) assert.ok(['completed', 'no-answer'].includes(call_status),