README.md in zold-0.16.16 vs README.md in zold-0.16.17

- old
+ new
@@ -11,9 +11,10 @@
 [![Build status](https://ci.appveyor.com/api/projects/status/15ola3lb03opv14m?svg=true)](https://ci.appveyor.com/project/yegor256/zold-wcn4o)
 [![PDD status](http://www.0pdd.com/svg?name=zold-io/zold)](http://www.0pdd.com/p?name=zold-io/zold)
 [![Gem Version](https://badge.fury.io/rb/zold.svg)](http://badge.fury.io/rb/zold)
 [![Test Coverage](https://img.shields.io/codecov/c/github/zold-io/zold.svg)](https://codecov.io/github/zold-io/zold?branch=master)
 
+[![Yard Docs](http://img.shields.io/badge/yard-docs-blue.svg)](http://rubydoc.info/github/zold-io/zold/master/frames)
 [![Maintainability](https://api.codeclimate.com/v1/badges/2861728929db934eb376/maintainability)](https://codeclimate.com/github/zold-io/zold/maintainability)
 
 **NOTICE**: It's an experiment and a very early draft! Please, feel free to
 submit your ideas and/or pull requests.
 