diff --git a/README.md b/README.md
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--- a/README.md
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-c3 [![Build Status](https://travis-ci.org/masayuki0812/c3.png?branch=master)](https://travis-ci.org/masayuki0812/c3)
+c3 [![Build Status](https://travis-ci.org/masayuki0812/c3.svg?branch=master)](https://travis-ci.org/masayuki0812/c3)
 ==
 
 c3 is a D3-based reusable chart library that enables deeper integration of charts into web applications.