diff --git a/README.md b/README.md
index 80c1e1c5..025facfe 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@ Serde Rust Serialization Framework
 ==================================
 
 [![Build Status](https://api.travis-ci.org/serde-rs/serde.png?branch=master)](https://travis-ci.org/serde-rs/serde)
+[![Coverage Status](https://coveralls.io/repos/serde-rs/serde/badge.svg?branch=master&service=github)](https://coveralls.io/github/serde-rs/serde?branch=master)
 [![Latest Version](https://img.shields.io/crates/v/serde.svg)](https://crates.io/crates/serde)
 
 Serde is a powerful framework that enables serialization libraries to