buffer is a dependency

index.js

@@ -3,6 +3,7 @@ var privsec = module.exports;
 privsec.deps = {};
 privsec.deps.bnjs = require('bn.js');
 privsec.deps.bs58 = require('bs58');
+privsec.deps.buffer = Buffer;
 privsec.deps.elliptic = require('elliptic');
 privsec.deps.hashjs = require('hash.js');
 privsec.deps.sha512 = require('sha512');
@@ -11,7 +12,6 @@ privsec.address = require('./lib/address');
 privsec.base58 = require('./lib/base58');
 privsec.base58check = require('./lib/base58check');
 privsec.bn = require('./lib/bn');
-privsec.buffer = Buffer;
 privsec.constants = require('./lib/constants');
 privsec.hash = require('./lib/hash');
 privsec.point = require('./lib/point');