diff --git a/README.md b/README.md
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 # Project V2Ray
 
 [![Build Status](https://travis-ci.org/v2ray/v2ray-core.svg?branch=master)](https://travis-ci.org/v2ray/v2ray-core)
+[![Coverage Status](https://coveralls.io/repos/v2ray/v2ray-core/badge.svg?branch=master&service=github)](https://coveralls.io/github/v2ray/v2ray-core?branch=master)
 
 V2Ray 是一个翻墙工具包，用于简化和复用其它翻墙工具，加速二次开发。