Railsログアウトできない sorcery

terminal でのログ：

Started DELETE "/sessions" for ::1 at 2015-04-08 23:57:38 +0900
Processing by SessionsController#destroy as HTML
Can't verify CSRF token authenticity
Redirected to http://localhost:3000/questions
Completed 302 Found in 5ms (ActiveRecord: 0.0ms)

 解決法：skip_before_filter :verify_authenticity_token

class ApplicationController < ActionController::Base
protect_from_forgery with: :exception
skip_before_filter :verify_authenticity_token
end

参考：

Rails 4.0だとCSRFトークンでエラーになる - Qiita

Rails4のCSRF対策で「Can't verify CSRF token authenticity」エラー - Qiita