Update README.md

Author: Bernabé González

README.md

@@ -3,7 +3,7 @@
 [![NPM version](https://img.shields.io/npm/v/redux-react-session.svg?style=flat)](https://npmjs.org/package/redux-react-session)
 [![Build status: Linux](https://img.shields.io/travis/bernabe9/redux-react-session.svg?style=flat)](https://travis-ci.org/bernabe9/redux-react-session)
 [![Dependency Status](https://img.shields.io/david/bernabe9/redux-react-session.svg)](https://david-dm.org/bernabe9/redux-react-session)
-[![Coverage Status](https://coveralls.io/repos/github/bernabe9/redux-react-session/badge.svg?branch=master)](https://coveralls.io/github/bernabe9/redux-react-session?branch=master)
+[![Coverage Status](https://img.shields.io/coveralls/bernabe9/redux-react-session.svg)](https://coveralls.io/github/bernabe9/redux-react-session?branch=master)
 
 Keep your session sync with localStorage and Redux :key: