Merge pull request #282 from vasinov/patch-1

Update README.md

README.md

@@ -1,4 +1,4 @@
-Audited [![Build Status](https://secure.travis-ci.org/collectiveidea/audited.png)](http://travis-ci.org/collectiveidea/audited) [![Dependency Status](https://gemnasium.com/collectiveidea/audited.png)](https://gemnasium.com/collectiveidea/audited)[![Code Climate](https://codeclimate.com/github/collectiveidea/audited.png)](https://codeclimate.com/github/collectiveidea/audited)
+Audited [![Build Status](https://secure.travis-ci.org/collectiveidea/audited.svg)](http://travis-ci.org/collectiveidea/audited) [![Dependency Status](https://gemnasium.com/collectiveidea/audited.svg)](https://gemnasium.com/collectiveidea/audited)[![Code Climate](https://codeclimate.com/github/collectiveidea/audited.svg)](https://codeclimate.com/github/collectiveidea/audited) [![Security](https://hakiri.io/github/collectiveidea/audited/master.svg)](https://hakiri.io/github/collectiveidea/audited/master)
 =======
 
 > ## Important version disclaimer