README.md in artwork-0.1.0 vs README.md in artwork-0.1.1

@@ -3,10 +3,12 @@
 Automated user-resolution-based image size choosing for your Rails views, but
 done at the backend. Works for any browser. Delivers the information needed for
 the calculations (browser window's dimentions and device's pixel ratio) via a
 cookie. Supports only Paperclip attachments.
 
+The gem should be thread-safe and should work with Rails 2.3 or newer.
+
 ## An example
 
 Say you've declared a default (base) resolution of 1440px. You design based on
 that resolution. You want to show the user an image which is half of the width
 of the user's browser. You then add the following to your view:
@@ -26,9 +28,16 @@
 You don't have that exact size on the server, so the helper will choose the
 1024px-wide version of the image.
 
 If the user's screen is retina (ie. with a device-to-pixel ratio > 1.0) and if
 you have a _2x versions of your thumbs, the helper will choose the _2x one.
+
+## Requirements
+
+- Rails 2.3 or newer
+- Paperclip 2.3 or newer
+- jQuery
+- The jQuery.cookie plugin
 
 ## Installation
 
 Add this line to your application's Gemfile: