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diff --git a/README.md b/README.md
index c4f2e831f..fd0fdb86f 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,4 @@
 # 0x.js
 
 [![CircleCI](https://circleci.com/gh/0xProject/0x.js.svg?style=svg&circle-token=61bf7cd8c9b4e11b132089dfcffdd1be277d1e0c)](https://circleci.com/gh/0xProject/0x.js)
+[![Coverage Status](https://coveralls.io/repos/github/0xProject/0x.js/badge.svg?branch=master&t=fp0cXD)](https://coveralls.io/github/0xProject/0x.js?branch=master)
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