Update README.markdown

korny · web-flow · commit a632d9056853 · 2019-11-24T14:28:25.000+01:00
diff --git a/README.markdown b/README.markdown
@@ -1,7 +1,7 @@
 # CodeRay
 
 [![Build Status](https://travis-ci.org/rubychan/coderay.svg?branch=master)](https://travis-ci.org/rubychan/coderay)
-[![Gem Version](https://badge.fury.io/rb/coderay.svg)](https://badge.fury.io/rb/coderay)
+[![Gem Version](https://badge.fury.io/rb/coderay.svg)](https://badge.fury.io/rb/coderay) [![Maintainability](https://api.codeclimate.com/v1/badges/e015bbd5eab45d948b6b/maintainability)](https://codeclimate.com/github/rubychan/coderay/maintainability)
 
 ## About
 
