README.md in material-sass-4.0.0 vs README.md in material-sass-4.1.0

@@ -20,33 +20,34 @@
 ## Installation
 
 Add this line to your application's Gemfile:
 
 ```ruby
-gem 'bootstrap',     '~> 4.0.0.beta2.1'
-gem 'material-sass', '~> 4.0.0.beta2'
+gem 'bootstrap',     '~> 4.1.0'
+gem 'material-sass', '~> 4.1.0'
 ```
 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 --pre
+$ gem install material-sass
 ```
 
 ## Usage
 
 ### a. Sass
 
 Import Materialize styles in `app/assets/stylesheets/application.scss`:
 
 ```scss
 @import "material";
+//ps: no need to import 'bootstrap'
 ```
 
 **NOTE:** If you have just generated a new Rails application, it  may come with a `.css` file instead. If this file exists, it will be served instead of Sass, so remove it.
 
 ```console
@@ -57,9 +58,10 @@
 
 Require Material javascripts in `app/assets/javascripts/application.js`:
 
 ```js
 //= require jquery
+//= require popper
 //= require bootstrap
 //= require material
 ```
 
 ### c. Icons