diff --git a/CHANGELOG.md b/CHANGELOG.md
index fb30b06..01687d5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -32,6 +32,10 @@ Changelog entries are classified using the following labels _(from [keep-a-chang
 
 </details>
 
+## [6.0.3] - 2020-01-16
+
+- Merge pull request #31 for issue #30
+
 ## [6.0.0] - 2017-10-13
 
 - refactor code to be more performant
@@ -153,5 +157,4 @@ Changelog entries are classified using the following labels _(from [keep-a-chang
 [0.1.0]: https://github.com/jonschlinkert/kind-of/commit/2fae09b0b19b1aadb558e9be39f0c3ef6034eb87
 
 [Unreleased]: https://github.com/jonschlinkert/kind-of/compare/0.1.2...HEAD
-[keep-a-changelog]: https://github.com/olivierlacan/keep-a-changelog
-
+[keep-a-changelog]: https://github.com/olivierlacan/keep-a-changelog
\ No newline at end of file
diff --git a/browser.js b/browser.js
index 82998d8..11394ef 100644
--- a/browser.js
+++ b/browser.js
@@ -1,4 +1,4 @@
-(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.index = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
+(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.index = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
 var toString = Object.prototype.toString;
 
 module.exports = function kindOf(val) {
@@ -67,7 +67,7 @@ module.exports = function kindOf(val) {
 };
 
 function ctorName(val) {
-  return val.constructor ? val.constructor.name : null;
+  return typeof val.constructor === 'function' ? val.constructor.name : null;
 }
 
 function isArray(val) {
@@ -130,4 +130,4 @@ function isBuffer(val) {
 }
 
 },{}]},{},[1])(1)
-});
\ No newline at end of file
+});
diff --git a/package.json b/package.json
index 73d70ae..5820cad 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "kind-of",
   "description": "Get the native type of a value.",
-  "version": "6.0.2",
+  "version": "6.0.3",
   "homepage": "https://github.com/jonschlinkert/kind-of",
   "author": "Jon Schlinkert (https://github.com/jonschlinkert)",
   "contributors": [