diff --git a/nfqueue.js b/nfqueue.js
index bcc3bd6..22589bb 100644
--- a/nfqueue.js
+++ b/nfqueue.js
@@ -66,7 +66,11 @@ NFQueue.prototype.run = function(callback) {
 exports.NFQueue = NFQueue;
 
 exports.createQueueHandler = function(num, buf, callback) {
-  if (!buf) { buf = 65535; }
+  if (typeof callback === 'undefined' && typeof buf === 'function') {
+    callback = buf;
+    buf = 65535;
+  };
+  
   var nfq = new NFQueue();
 
   nfq.open(num, buf);
diff --git a/package.json b/package.json
index a95cf83..03455fb 100644
--- a/package.json
+++ b/package.json
@@ -24,6 +24,6 @@
     "iptables"
   ],
   "dependencies": {
-    "nan": "^2.2.0"
+    "nan": "^2.10.0"
   }
 }