diff --git a/README.md b/README.md
index b78f55cb..196de8bd 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ PaperTrail lets you track changes to your models' data.  It's good for auditing
 
 ## Rails Version
 
-Works on Rails 3 and Rails 2.3.  Probably works on Rails 2.2 and 2.1.
+Works on Rails 3 and Rails 2.3.  The Rails 3 code is on the master branch and tagged v2.x.  The Rails 2.3 code is on the Rails 2 branch and tagged 1.x.
 
 
 ## API Summary
@@ -490,7 +490,7 @@ Over time your `versions` table will grow to an unwieldy size.  Because each ver
 
 1. Install PaperTrail as a gem via your `Gemfile`:
 
-    `gem 'paper_trail'`
+    `gem 'paper_trail', '~> 2'`
 
 2. Generate a migration which will add a `versions` table to your database.
 
@@ -506,7 +506,7 @@ Over time your `versions` table will grow to an unwieldy size.  Because each ver
 
 1. Install PaperTrail as a gem via your `config/environment.rb`:
 
-    `config.gem 'paper_trail'`
+    `config.gem 'paper_trail', :version => '~> 1'`
 
 2. Generate a migration which will add a `versions` table to your database.