README.md in bootstrap-on-rails-3.2.0 vs README.md in bootstrap-on-rails-3.3.1

@@ -1,10 +1,10 @@
 # Bootstrap on Rails
 
 A simpler implementation of Bootstap 3 for Rails. Only packaged assets. No bloat. Pure Less.
 
-* Current Bootstrap Version: 3.2.0
+* Current Bootstrap Version: 3.3.1
 * Supports Rails 3.1+ and Rails 4
 * Less only
 * Twitter Variables are easily overridable
 
 ## Installation
@@ -53,9 +53,13 @@
     //= require bootstrap/tab
     //= require bootstrap/transition
 
 
 It's important to note that variables.less is taken out of bootstrap and required explicitly to support overriding variables, another motivation why I needed to do this gem.
+
+## Upgrading
+
+If you're using your own custom variables.less, once in a while you'll get missing variables. Just in case that happens, just look it up on the main variables.less file here: https://github.com/twbs/bootstrap/blob/master/less/variables.less
 
 ## Notes
 
 * bootstrap-on-rails now follows the same bootstrap versioning
 * An example project can be seen here https://github.com/jasontorres/bootstrap-on-rails-example