README.md in pure-css-rails-0.0.2 vs README.md in pure-css-rails-0.2.1

@@ -1,8 +1,8 @@
 # Pure CSS for Rails Asset Pipeline
 
-Based on [pure.css](http://purecss.io/) version 0.1.0.
+Based on [pure.css](http://purecss.io/) version 0.2.1.
 
 ## Install
 
 1. Add this to your Gemfile
 
@@ -18,9 +18,18 @@
     `*= pure`
 
 4. Profit!
 
 You don't need to add `normalize.css`, it is already included.
+
+## History
+
+Since 0.2.1, the gem and the pure.css versions match, so it is easier to pin
+the library to a specific version via the Gemfile.
+
+0.2.1 - Pure 0.2.1
+0.0.2 - Pure 0.2.0
+0.0.1 - Pure 0.1.0
 
 ## Contribute
 
 In the case you find out that something is missing or does not work in a way
 you'd expect, please file an issue through GitHub.