README.md in mongoid-encryptor-0.0.4 vs README.md in mongoid-encryptor-0.0.5

@@ -2,9 +2,17 @@
 =================
 
 mongoid-encryptor encrypts and decrypts one or more fields in a Mongoid model.
 
 
+Prerequisites
+-------------
+
+* ruby 1.9.2 or 1.9.3
+* mongoid 2.0 or later
+* activesupport 3.0 or later
+
+
 Install
 -------
 
 Put this line in your Gemfile: