diff --git a/README.md b/README.md
index 9a8c9d0a..66035b3f 100644
--- a/README.md
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@@ -4,6 +4,7 @@
 
 [![Build Status](https://travis-ci.org/skypjack/uvw.svg?branch=master)](https://travis-ci.org/skypjack/uvw)
 [![Build status](https://ci.appveyor.com/api/projects/status/m5ndm8gnu8isg2to?svg=true)](https://ci.appveyor.com/project/skypjack/uvw)
+[![Coverage Status](https://coveralls.io/repos/github/skypjack/uvw/badge.svg?branch=master)](https://coveralls.io/github/skypjack/uvw?branch=master)
 [![Donate](https://img.shields.io/badge/Donate-PayPal-green.svg)](https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=W2HF9FESD5LJY&lc=IT&item_name=Michele%20Caini&currency_code=EUR&bn=PP%2dDonationsBF%3abtn_donateCC_LG%2egif%3aNonHosted)
 
 # Introduction