README.md in carrierwave-base64-2.2.0 vs README.md in carrierwave-base64-2.3.0

@@ -5,11 +5,11 @@
 
 Upload files encoded as base64 to carrierwave.
 
 This small gem can be useful for API's that interact with mobile devices.
 
-As of version 2.2.0, this gem requires Ruby 2.0 or higher
+As of version 2.3.0, this gem requires Ruby 2.0 or higher
 
 ## Installation
 
 Add the gem to your Gemfile:
 
@@ -30,9 +30,19 @@
 ```ruby
 mount_base64_uploader :image, ImageUploader
 ```
 
 Now you can also upload files by passing an encoded base64 string to the attribute.
+
+## Setting the file name
+
+To set the file name for the uploaded files, use the `:file_name` option:
+
+```ruby
+mount_base64_uploader :image, ImageUploader, file_name: 'userpic'
+```
+
+This value will be used, when naming stored files. Extention will be taked from the base64 content-type spec.
 
 ## Data format
 
 The string with the encoded data, should be prefixed with Data URI scheme format: