diff --git a/.travis.yml b/.travis.yml
index d0d0551..e8484f2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,3 +19,8 @@ matrix:
   allow_failures:
     - rvm: ruby-head
   fast_finish: true
+
+env:
+  global:
+    - secure: XxWS0ZHWJihapUWdVVrN5aV9WiTKFkGcy+pRouWcIl2v8HSgemVXA+K5LKyzrBlXuszKjBeNrpfucytSU3GxAREcaIAegpUYt05E4Znfk9RDwWY9EFp7sTnL+KPVHA3zx0gnWKXYjIBD4yQBuyh2nO5EaspndZRvhf+Hal7PCUY=
+    - secure: Yu7o95yH6054mA+DjGzl9I3hBnkStXeS3jXWcuMY3iiMhibXQLOcpbdWhs5G+CumCnnFIZlRbxjRvAC9e+WMVf8n1DL2+BxRErVbT8MHK2rONVWbcoWmC7q1+SIEXLXC4EJ/jBL8/9NMKc91ekTIKLkyYmXbkmZnB+KnOODpUFo=
diff --git a/README.md b/README.md
index 8d9a1af..ece02c4 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,11 @@ switch_monitor
 ==============
 
 [![Build Status](http://img.shields.io/travis/trema/switch_monitor/develop.svg?style=flat)][travis]
+[![Coverage Status](http://img.shields.io/coveralls/trema/patch_panel/develop.svg?style=flat)][coveralls]
 [![Code Climate](http://img.shields.io/codeclimate/github/trema/switch_monitor.svg?style=flat)][codeclimate]
 
+OpenFlow switch liveness monitor.
+
 [travis]: http://travis-ci.org/trema/switch_monitor
+[coveralls]: https://coveralls.io/r/trema/patch_panel
 [codeclimate]: https://codeclimate.com/github/trema/switch_monitor