diff --git a/readme.md b/readme.md
index 9fe2892..17c47db 100644
--- a/readme.md
+++ b/readme.md
@@ -14,6 +14,7 @@ MQTT client resides in the `Client` class. The examples scripts in `samples/` su
 
 ## Build status
 [![Build Status](https://travis-ci.org/beerfactory/hbmqtt.svg?branch=master)](https://travis-ci.org/beerfactory/hbmqtt)
+[![Coverage Status](https://coveralls.io/repos/beerfactory/hbmqtt/badge.svg?branch=develop&service=github)](https://coveralls.io/github/beerfactory/hbmqtt?branch=develop)
 
 ## Support