README.md in coach-0.5.0 vs README.md in coach-0.5.1

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 # Coach
 
 [![Gem Version](https://badge.fury.io/rb/coach.svg)](http://badge.fury.io/rb/coach)
-[![Build Status](https://travis-ci.org/gocardless/coach.png?branch=master)](https://travis-ci.org/gocardless/coach)
-[![Code Climate](https://codeclimate.com/github/gocardless/coach.png)](https://codeclimate.com/github/gocardless/coach)
+[![Build Status](https://travis-ci.org/gocardless/coach.svg?branch=master)](https://travis-ci.org/gocardless/coach)
+[![Code Climate](https://codeclimate.com/github/gocardless/coach.svg)](https://codeclimate.com/github/gocardless/coach)
 
 Coach improves your controller code by encouraging:
 
 - **Modularity** - No more tangled `before_filter`'s and interdependent concerns. Build
   Middleware that does a single job, and does it well.