diff --git a/lib/type/bignumber/BigNumber.js b/lib/type/bignumber/BigNumber.js
index af0c88981..895dfb5fd 100644
--- a/lib/type/bignumber/BigNumber.js
+++ b/lib/type/bignumber/BigNumber.js
@@ -1,9 +1,7 @@
 var Decimal = require('decimal.js');
 
 function factory (type, config, load, typed, math) {
-  //var BigNumber = Decimal.clone(config);  // TODO: use this shorter notation after https://github.com/MikeMcl/decimal.js/issues/26 is fixed
-  var BigNumber = Decimal.clone();
-  BigNumber.config(config);
+  var BigNumber = Decimal.clone({precision: config.precision});
 
   /**
    * Attach type information
diff --git a/package.json b/package.json
index c6a1bdc82..6cbc45968 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,7 @@
     "unit"
   ],
   "dependencies": {
-    "decimal.js": "5.0.3",
+    "decimal.js": "5.0.4",
     "fraction.js": "3.2.5",
     "complex.js": "1.9.6",
     "tiny-emitter": "1.0.2",
diff --git a/test/utils/bignumber/constants.test.js b/test/utils/bignumber/constants.test.js
index b52d0b209..6997e6487 100644
--- a/test/utils/bignumber/constants.test.js
+++ b/test/utils/bignumber/constants.test.js
@@ -1,10 +1,8 @@
 // test bignumber utils
 var assert = require('assert');
 var BigNumber = require('decimal.js');
-var Big32 = BigNumber.clone();
-Big32.config({precision: 32});
-var Big64 = BigNumber.clone();
-Big64.config({precision: 64});
+var Big32 = BigNumber.clone({precision: 32});
+var Big64 = BigNumber.clone({precision: 64});
 var constants = require('../../../lib/utils/bignumber/constants');
 
 describe('bignumber', function() {
diff --git a/test/utils/bignumber/formatter.test.js b/test/utils/bignumber/formatter.test.js
index 07800676a..b35ead661 100644
--- a/test/utils/bignumber/formatter.test.js
+++ b/test/utils/bignumber/formatter.test.js
@@ -9,8 +9,7 @@ describe('format', function () {
     var B = null;
 
     before (function () {
-      B = BigNumber.clone();
-      B.config({precision: 20}); // ensure the precision is 20 digits
+      B = BigNumber.clone({precision: 20});  // ensure the precision is 20 digits
     });
 
     it ('should format special values Infinity, NaN', function () {
@@ -142,8 +141,7 @@ describe('format', function () {
     });
 
     it('should format bignumbers with custom precision, lower, and upper bound', function() {
-      var Big = BigNumber.clone();
-      Big.config({precision: 100});
+      var Big = BigNumber.clone({precision: 100});
 
       var options = {
         notation: 'auto',
@@ -219,8 +217,7 @@ describe('format', function () {
   });
 
   it('should format a bignumber using toFixed', function() {
-    var Big = BigNumber.clone();
-    Big.config({precision: 100});
+    var Big = BigNumber.clone({precision: 100});
 
     assert.equal(formatter.toFixed(new Big(2.34)), '2');
     assert.equal(formatter.toFixed(new Big(2.34), 1), '2.3');
@@ -231,8 +228,7 @@ describe('format', function () {
   });
 
   it('should format a bignumber using toExponential', function() {
-    var Big = BigNumber.clone();
-    Big.config({precision: 100});
+    var Big = BigNumber.clone({precision: 100});
 
     assert.equal(formatter.toExponential(new Big(2.34)), '2.34e+0');
     assert.equal(formatter.toExponential(new Big(2.34e+3)), '2.34e+3');