diff --git a/lib/message/index.js b/lib/message/index.js
index 3f73533..9fc18e3 100644
--- a/lib/message/index.js
+++ b/lib/message/index.js
@@ -6,7 +6,7 @@
 var debug = require('debug')('nslsk:message')
   , zlib = require('zlib')
   , Buffers = require('buffers')
-  , bigint = require('bigint');
+  , bignum = require('bignum');
 
 /**
  * Expose `Message`.
@@ -42,16 +42,16 @@ function Message(buffers) {
   if (!(this instanceof Message)) {
     return new Message(buffers);
   }
-  
+
   this.name = 'unknown';
   this._cursor = 0;
-  
+
   if (buffers instanceof Buffers) {
     this._buffers = buffers;
   } else {
     this._buffers = new Buffers();
   }
-  
+
   if ('[object Number]' === Object.prototype.toString.call(buffers)) {
     this.uint32(buffers);  // code
   }
@@ -65,10 +65,10 @@ function Message(buffers) {
 Message.prototype.uint32 = function(val) {
   if (val) {
     var buf = new Buffer(4);
-  
+
     buf.writeUInt32LE(val, 0);
     this._buffers.push(buf);
-  
+
     return this;
   }
   var ret = this._buffers.slice(this._cursor, this._cursor + 4).readUInt32LE(0);
@@ -99,10 +99,10 @@ Message.prototype.uchar = function(val) {
 Message.prototype.string = function(val) {
   if (val) {
     var buf = new Buffer(val, 'utf8');
-  
+
     this.uint32(buf.length);
     this._buffers.push(buf);
-  
+
     return this;
   }
   var len = this.uint32();
@@ -119,10 +119,10 @@ Message.prototype.string = function(val) {
 Message.prototype.int32 = function(val) {
   if (val) {
     var buf = new Buffer(4);
-  
+
     buf.writeInt32LE(val, 0);
     this._buffers.push(buf);
-  
+
     return this;
   }
   var ret = this._buffers.slice(this._cursor, this._cursor + 4).readInt32LE(0);
@@ -132,7 +132,7 @@ Message.prototype.int32 = function(val) {
 
 /**
  * @param {Number} val [optional]
- * @return {Message|BigInt}
+ * @return {Message|bignum}
  */
 
 Message.prototype.int64 = function(val) {
@@ -141,7 +141,7 @@ Message.prototype.int64 = function(val) {
   }
   var buf = this._buffers.slice(this._cursor, this._cursor + 8);
   this._cursor += 8;
-  return bigint.fromBuffer(buf, { endinan: 'little' });
+  return bignum.fromBuffer(buf, { endinan: 'little' });
 };
 
 /**
@@ -163,7 +163,7 @@ Message.prototype.bool = function(val) {
 Message.prototype.ip = function() {
   var ip = this.uint32()
     , buf = new Buffer(4);
-  
+
   buf.writeUInt32BE(ip, 0);
   return [buf[0], buf[1], buf[2], buf[3]].join('.');
 };
@@ -187,7 +187,7 @@ Message.prototype.push = function(buffer) {
 
 Message.prototype.decompress = function(callback) {
   var buf = this._buffers.splice(4).toBuffer();
-  
+
   zlib.unzip(buf, function(err, buf) {
     if (err) {
       return callback.call(this, err, buf);
@@ -195,7 +195,7 @@ Message.prototype.decompress = function(callback) {
     this._buffers.push(buf);
     callback.call(this, err, this);
   }.bind(this));
-  
+
   return this;
 };
 
@@ -210,9 +210,9 @@ Message.prototype.decompress = function(callback) {
 Message.prototype.decode = function(type, callback) {
   this._cursor = 0;
   var code = this.uint32();
-  
+
   debug('%s:%s', type, code/*, this._buffers */);
-  
+
   switch (type) {
     case 'server':
       var message = Message.SERVER[code];
@@ -226,13 +226,13 @@ Message.prototype.decode = function(type, callback) {
     default:
       throw new TypeError('Unknown message type [' + type + ']');
   }
-  
+
   if (!message) {
     throw new Error('Unknown ' + type + ' message code [' + code + ']');
   }
-  
+
   this.name = message.name;
-  
+
   switch (message.decode.length) {
     case 2:
       message.decode.call(this, this, callback);
@@ -244,7 +244,7 @@ Message.prototype.decode = function(type, callback) {
     default:
       throw new Error('invalid parameters');
   }
-  
+
   return this;
 };
 
@@ -254,10 +254,10 @@ Message.prototype.decode = function(type, callback) {
 
 Message.prototype.end = function(callback) {
   var buf = new Buffer(4);
-  
+
   buf.writeUInt32LE(this._buffers.length, 0);
   this._buffers.unshift(buf);
   this._cursor += 4;
-  
+
   return callback.call(this, this._buffers);
-};
\ No newline at end of file
+};
diff --git a/package.json b/package.json
index 77ac29f..d883fa2 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
   "dependencies": {
     "buffers": "~0.1.1",
     "debug": "~0.7.0",
-    "bigint": "~0.3.9",
+    "bignum": "~0.11.0",
     "commander": "~1.1.1"
   },
   "devDependencies": {