diff --git a/README.rdoc b/README.rdoc
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 == ya_acl
 
 {<img src="https://secure.travis-ci.org/kaize/ya_acl.png" alt="Build Status" />}[http://travis-ci.org/kaize/ya_acl]
+{<img src="https://coveralls.io/repos/kaize/ya_acl/badge.png?branch=master" alt="Coverage" />}[https://coveralls.io/r/kaize/ya_acl]
 
 Ya_Acl - access control list (ACL) implementation for your Ruby application.