diff --git a/src/type/bignumber/BigNumber.js b/src/type/bignumber/BigNumber.js
index fbf09606c..6511728d5 100644
--- a/src/type/bignumber/BigNumber.js
+++ b/src/type/bignumber/BigNumber.js
@@ -1,5 +1,6 @@
 'use strict'
-const Decimal = require('decimal.js/decimal.js') // make sure to pick the es5 version
+
+import Decimal from 'decimal.js'
 
 function factory (type, config, load, typed, math) {
   const BigNumber = Decimal.clone({precision: config.precision})