diff --git a/lib/account.js b/lib/account.js
index b702298..571ad94 100644
--- a/lib/account.js
+++ b/lib/account.js
@@ -6,6 +6,7 @@ import BigInteger from "jsbn";
 import * as pako from "pako";
 import cryptoJs from "crypto-js";
 import hex from "crypto-js/enc-hex";
+import { Buffer } from "buffer";
 
 function rsConvert(address) {
   var addr = new NxtAddress();
diff --git a/lib/helpers.js b/lib/helpers.js
index b9e3448..5a81bf8 100644
--- a/lib/helpers.js
+++ b/lib/helpers.js
@@ -1,6 +1,7 @@
 import cryptoJs from "crypto-js";
 import hex from "crypto-js/enc-hex";
 import { BigInteger } from "jsbn";
+import { Buffer } from "buffer";
 
 var charToNibble = {};
 var nibbleToChar = [];