README.md in friendly_id-3.3.1 vs README.md in friendly_id-3.3.1.1

@@ -19,10 +19,11 @@
 excellent Unicode support. For complete information on using FriendlyId,
 please see the [FriendlyId Guide](https://github.com/norman/friendly_id/blob/3.x/Guide.md)
 
 ## Compatibility
 
-FriendlyId 3.3.0 is compatible with Active Record 3.0 and 3.1.
+FriendlyId 3.3.0 is compatible with Active Record 3.0 and 3.1. For Rails 3.2
+and higher, please use FriendlyId 4.x.
 
 If you are still on Rails 2.3, please use FriendlyId 3.2.x.
 
 ## Roadmap