README.md in cistern-2.7.2 vs README.md in cistern-2.8.0

@@ -203,10 +203,10 @@
 
 	```ruby
 	model.merge_attributes("post" => 1)
 	model.post_id #=> 1
 	```
-* `:type` automatically casts the attribute do the specified type. 
+* `:type` automatically casts the attribute do the specified type. Supported types: `array`, `boolean`, `date`, `float`, `integer`, `string`, `time`.
 	```ruby
 	attribute :private_ips, type: :array
 
 	model.merge_attributes("private_ips" => 2)
 	model.private_ips #=> [2]