README.md in greynoise-0.1.0 vs README.md in greynoise-0.1.1

@@ -1,7 +1,8 @@
 # greynoise
 
+[![Gem Version](https://badge.fury.io/rb/greynoise.svg)](https://badge.fury.io/rb/greynoise)
 [![Build Status](https://travis-ci.com/ninoseki/greynoise.svg?branch=master)](https://travis-ci.com/ninoseki/greynoise)
 [![Coverage Status](https://coveralls.io/repos/github/ninoseki/greynoise/badge.svg?branch=master)](https://coveralls.io/github/ninoseki/greynoise?branch=master)
 [![CodeFactor](https://www.codefactor.io/repository/github/ninoseki/greynoise/badge)](https://www.codefactor.io/repository/github/ninoseki/greynoise)
 
 GreyNoise API wrapper for Ruby.
@@ -15,10 +16,10 @@
 ## Usage
 
 ```ruby
 require "greynoise"
 
-# when given nothing, it tries to load your API key via ENV["GREYNOISE_API_KEY"]
+# when given nothing, it tries to load your API key via ENV["GREYNOISE_API_KEY"] and `~/.config/greynoise/config`
 api = GreyNoise::API.new
 # or you can set it manually
 api = GreyNoise::API.new(key: YOUR_API_KEY)
 
 api.experimental.gnql(query)