diff --git a/index.js b/index.js
index 4cd646f..02c86e7 100644
--- a/index.js
+++ b/index.js
@@ -6,8 +6,7 @@ var required = require('requires-port')
   , slashes = /^[A-Za-z][A-Za-z0-9+-.]*:\/\//
   , protocolre = /^([a-z][a-z0-9.+-]*:)?(\/\/)?([\\/]+)?([\S\s]*)/i
   , windowsDriveLetter = /^[a-zA-Z]:/
-  , whitespace = '[\\x09\\x0A\\x0B\\x0C\\x0D\\x20\\xA0\\u1680\\u180E\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200A\\u202F\\u205F\\u3000\\u2028\\u2029\\uFEFF]'
-  , left = new RegExp('^'+ whitespace +'+');
+  , whitespace = /^[ \f\n\r\t\v\u00a0\u1680\u2000-\u200a\u2028\u2029\u202f\u205f\u3000\ufeff]+/;
 
 /**
  * Trim a given string.
@@ -16,7 +15,7 @@ var required = require('requires-port')
  * @public
  */
 function trimLeft(str) {
-  return (str ? str : '').toString().replace(left, '');
+  return (str ? str : '').toString().replace(whitespace, '');
 }
 
 /**