Update README.md

Author: guybedford

README.md

@@ -9,7 +9,7 @@ Dynamically loads ES6 modules in NodeJS and current browsers.
 * Polyfills ES6 Promises in the browser with an optionally bundled ES6 promise implementation.
 * [Compatible with NodeJS](#nodejs-usage) allowing for server-side module loading and tracing extensions.
 * Supports ES6 module loading in IE8+. Other ES6 features only supported by Traceur in IE9+.
-* The complete combined polyfill, including ES6 promises, comes to 8.7KB minified and gzipped, making it suitable for production use, provided that modules are [built into ES5 making them independent of Traceur](#moving-to-production).
+* The complete combined polyfill, including ES6 promises, comes to 9KB minified and gzipped, making it suitable for production use, provided that modules are [built into ES5 making them independent of Traceur](#moving-to-production).
 
 For an overview of build workflows, [see the production guide](#moving-to-production).