diff --git a/dart/lib/discovery/client.dart b/dart/lib/discovery/client.dart
index d120433..f9eab6e 100644
--- a/dart/lib/discovery/client.dart
+++ b/dart/lib/discovery/client.dart
@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 import 'dart:async';
-import 'dart:convert';
 
 import 'package:flutter/services.dart' show shell;
 import 'package:logging/logging.dart';
@@ -51,7 +50,7 @@
   serviceAttrs['deckid'] = presentation.deck.key;
   serviceAttrs['name'] = presentation.deck.name;
   v23discovery.Service serviceInfo = new v23discovery.Service()
-    ..instanceUuid = UTF8.encode(presentation.key)
+    ..instanceId = presentation.key
     ..interfaceName = presentationInterfaceName
     ..instanceName = presentation.key
     ..attrs = serviceAttrs
@@ -98,7 +97,7 @@
 
   stoppingCall.then((_) {
     _advertiseCalls.remove(presentationId);
-  log.info('Stopped advertising ${presentationId}.');
+    log.info('Stopped advertising ${presentationId}.');
   }).catchError((e) {
     _stoppingAdvertisingCalls.remove(presentationId);
     throw e;
@@ -150,7 +149,7 @@
 
   _stoppingScanCall.then((_) {
     _scanCall = null;
-  log.info('Scan stopped.');
+    log.info('Scan stopped.');
   }).catchError((e) {
     _stoppingScanCall = null;
     throw e;
@@ -159,7 +158,7 @@
 
 class ScanHandler extends v23discovery.ScanHandler {
   found(v23discovery.Service s) async {
-    String key = UTF8.decode(s.instanceUuid);
+    String key = s.instanceId;
     log.info('Found presentation ${s.attrs['name']} under $key.');
     // Ignore our own advertised services.
     if (_advertiseCalls.containsKey(key)) {
@@ -181,8 +180,7 @@
     _onFoundEmitter.add(presentation);
   }
 
-  lost(List<int> instanceId) {
-    String presentationId = UTF8.decode(instanceId);
+  lost(String presentationId) {
     // Ignore our own advertised services.
     log.info('Lost presentation $presentationId.');
     _onLostEmitter.add(presentationId);
diff --git a/dart/pubspec.lock b/dart/pubspec.lock
index bf3850a..f3021f6 100644
--- a/dart/pubspec.lock
+++ b/dart/pubspec.lock
@@ -154,7 +154,7 @@
   path:
     description: path
     source: hosted
-    version: "1.3.6"
+    version: "1.3.7"
   petitparser:
     description: petitparser
     source: hosted
@@ -174,7 +174,7 @@
   shelf:
     description: shelf
     source: hosted
-    version: "0.6.4+1"
+    version: "0.6.4+2"
   shelf_static:
     description: shelf_static
     source: hosted
@@ -234,7 +234,7 @@
   v23discovery:
     description: v23discovery
     source: hosted
-    version: "0.0.4"
+    version: "0.0.5"
   vector_math:
     description: vector_math
     source: hosted