README.md in weak_parameters-0.1.2 vs README.md in weak_parameters-0.1.3

@@ -6,10 +6,20 @@
 gem "weak_parameters"
 ```
 
 ## Usage
 ```ruby
+class ApplicationController < ActionController::Base
+  protect_from_forgery
+
+  respond_to :json
+
+  rescue_from WeakParameters::ValidationError do
+    head 400
+  end
+end
+
 # WeakParameters provides `validates` class method to define validations.
 class RecipesController < ApplicationController
   validates :create do
     string :name, required: true, except: ["charlie", "dave"]
     integer :type, only: 1..3
@@ -43,9 +53,15 @@
 * float
 * hash
 * integer
 * string
 * boolean (= 0, 1, false, true)
+
+### Avilable options
+* required
+* only
+* except
+* handler
 
 ## Tips
 WeakParameters.stats returns its validation metadata, and this is useful for auto-generating API documents.
 With [autodoc](https://github.com/r7kamura/autodoc), you can auto-generate API documents with params information.