Correct build status URL

Why the other one didn't work is a mystery

README.md

@@ -3,7 +3,9 @@ Recog: A Recognition Framework
 
 Recog is a framework for identifying products, services, operating systems, and hardware by matching fingerprints against data returned from various network probes. Recog makes it simple to extract useful information from web server banners, snmp system description fields, and a whole lot more. Recog is open source, please see the [LICENSE](https://raw.githubusercontent.com/rapid7/recog/master/LICENSE) file for more information.
 
-[![Gem Version](https://badge.fury.io/rb/recog.svg)](http://badge.fury.io/rb/recog) [![Build Status](https://travis-ci.org/rapid7/recog.png)](https://travis-ci.org/rapid7/recog)
+[![Gem Version](https://badge.fury.io/rb/recog.svg)](http://badge.fury.io/rb/recog) 
+[![Build Status](https://travis-ci.org/rapid7/recog.svg?branch=master)](https://travis-ci.org/rapid7/recog)
+
 ==
 
 ## Installation