diff --git a/lib/inventory.js b/lib/inventory.js
index 42bb0fae..e0193eb5 100644
--- a/lib/inventory.js
+++ b/lib/inventory.js
@@ -84,6 +84,20 @@ Inventory.prototype.toBufferWriter = function(bw) {
   return bw;
 };
 
+/**
+ * @return {String} name of inventory type
+ */
+Inventory.prototype.typeName = function () {
+  return Inventory.TYPE_NAME[this.type];
+};
+
+/**
+ * @return {String} name of inventory type : hash
+ */
+Inventory.prototype.toString = function () {
+  return this.typeName() + ':' + BufferUtil.reverse(this.hash).toString('hex');
+};
+
 /**
  * @param {Buffer} payload - Serialized buffer of the inventory
  */
diff --git a/lib/peer.js b/lib/peer.js
index 25a4eaa9..7d450304 100644
--- a/lib/peer.js
+++ b/lib/peer.js
@@ -190,8 +190,8 @@ Peer.prototype.disconnect = function() {
  * Send a Message to the remote peer.
  * @param {Message} message - A message instance
  */
-Peer.prototype.sendMessage = function(message) {
-  this.socket.write(message.toBuffer());
+Peer.prototype.sendMessage = function(message, cb) {
+  this.socket.write(message.toBuffer(), cb);
 };
 
 /**
diff --git a/package.json b/package.json
index 3c23831d..a28f796a 100644
--- a/package.json
+++ b/package.json
@@ -52,9 +52,9 @@
     "url": "https://github.com/bitpay/bitcore-p2p.git"
   },
   "dependencies": {
-    "bitcore": "^0.12.0",
+    "bitcore": "^0.13.0",
     "bloom-filter": "^0.2.0",
-    "buffers": "^0.1.1",
+    "buffers": "olalonde/node-buffers",
     "socks5-client": "^0.3.6"
   },
   "devDependencies": {