diff --git a/README.md b/README.md
index b1047bdd..0ab9cafb 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,7 @@
 [![Build Status](https://travis-ci.org/zeit/hyperterm.svg?branch=master)](https://travis-ci.org/zeit/hyperterm)
 [![Slack Channel](https://zeit-slackin.now.sh/badge.svg)](https://zeit.chat/)
 [![Changelog #213](https://img.shields.io/badge/changelog-%23213-lightgrey.svg)](https://changelog.com/213)
+[![XO code style](https://img.shields.io/badge/code_style-XO-5ed9c7.svg)](https://github.com/sindresorhus/xo)
 
 For more details, head to: https://hyperterm.org