diff --git a/lib/utils.js b/lib/utils.js
index 634f9003..cfc96921 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -1,6 +1,5 @@
 var fs = require('fs-extra');
 var utils = require('peglib').utils;
-const bitcoin = require('peglib').bitcoin;
 const merkleLib = require('merkle-lib');
 const pmtBuilder = require('@rsksmart/pmt-builder');
 const bitcoinJs = require('bitcoinjs-lib');
@@ -13,7 +12,9 @@ var sequentialPromise = function(n, promiseReturn) {
 };
 
 const publicKeyToCompressed = function(publicKey) {
-  return bitcoin.keys.publicKeyToCompressed(publicKey);
+  return bitcoinJs.ECPair.fromPublicKey(Buffer.from(publicKey, 'hex'), { compressed: true })
+  .publicKey
+  .toString('hex');
 }
 
 var mapPromiseAll = function(map) {