README.md in acts_as_hashids-0.1.4 vs README.md in acts_as_hashids-0.1.5

@@ -1,13 +1,14 @@
 # acts_as_hashids
 
 [![Gem Version][gem-image]][gem-link]
+[![Download][download-image]][download-link]
 [![Build Status][build-image]][build-link]
 [![Coverage Status][cov-image]][cov-link]
 [![Code Climate][gpa-image]][gpa-link]
 
-Use [Hashids](https://github.com/peterhellberg/hashids.rb) (a.k.a. Youtube-Like ID) in ActiveRecord effectively.
+Use [Hashids](https://github.com/peterhellberg/hashids.rb) (a.k.a. Youtube-Like ID) in ActiveRecord seamlessly.
 
 ## Installation
 
 Add the acts_as_hashids gem to your Gemfile.
 
@@ -79,10 +80,23 @@
 
 Foo2.create.to_param
 # => "RxQce3a2"
 ```
 
+### alphabet
+
+Specify which characters you use to generate hashids.
+
+```rb
+class Foo < ActiveRecord::Base
+  acts_as_hashids alphabet: '0123456789uvwxyz'
+end
+
+Foo3.create(id: 1).to_param
+# => "4xw8zwyv"
+```
+
 ## Test
 
 Execute the command below to run rspec and rubocop.
 
 ```
@@ -104,9 +118,11 @@
 
 
 
 [gem-image]:   https://badge.fury.io/rb/acts_as_hashids.svg
 [gem-link]:    http://badge.fury.io/rb/acts_as_hashids
+[download-image]:https://img.shields.io/gem/dt/acts_as_hashids.svg
+[download-link]:https://rubygems.org/gems/acts_as_hashids
 [build-image]: https://secure.travis-ci.org/dtaniwaki/acts_as_hashids.png
 [build-link]:  http://travis-ci.org/dtaniwaki/acts_as_hashids
 [cov-image]:   https://coveralls.io/repos/dtaniwaki/acts_as_hashids/badge.png
 [cov-link]:    https://coveralls.io/r/dtaniwaki/acts_as_hashids
 [gpa-image]:   https://codeclimate.com/github/dtaniwaki/acts_as_hashids.png