README.md in material-sass-4.0.0.beta2 vs README.md in material-sass-4.0.0.beta3

@@ -20,22 +20,22 @@
 ## Installation
 
 Add this line to your application's Gemfile:
 
 ```ruby
-gem 'bootstrap',     '~> 4.0.0.beta'
-gem 'material-sass', '~> 4.0.0.beta'
+gem 'bootstrap',     '~> 4.0.0.beta2.1'
+gem 'material-sass', '~> 4.0.0.beta2'
 ```
 And then run the bundler and restart your server to make the files available through the pipeline:
 
 ```console
 $ bundle install
 ```
 
 Or install it yourself as:
 
 ```console
-$ gem install material-sass
+$ gem install material-sass --pre
 ```
 
 ## Usage
 
 ### a. Sass