README.md in transitions-1.1.1 vs README.md in transitions-1.2.0

@@ -298,10 +298,11 @@
 #### Timestamps
 
 If you'd like to note the time of a state change, Transitions comes with
 timestamps free! To activate them, simply pass the `timestamp` option to the
 event definition with a value of either true or the name of the timestamp
-column. *NOTE - This should be either true, a String or a Symbol*
+column. *NOTE - This should be either true, a String, a Symbol, or an Array of
+these*
 ```ruby
 # This will look for an attribute called exploded_at or exploded_on (in that order)
 # If present, it will be updated
 event :explode, :timestamp => true do
   transitions :from => :complete, :to => :exploded