README.md in timespan-0.3.2 vs README.md in timespan-0.4.0

@@ -105,9 +105,11 @@
     lasting: der varer ialt
 ```
 
 ## Timespan for Mongoid
 
+Tested and works with Mongoid 2.4 and 3.0.0.rc
+
 Custom Timespan datatype
 
 ```ruby
 require 'timespan/mongoid'