Workarea.configure do |config| config.mail_chimp = ActiveSupport::Configurable::Configuration.new config.mail_chimp.default_list_id = '' config.mail_chimp.email_interests_id = '' config.mail_chimp.default_store = { id: "" , list_id: "", name: "Ecommerce Store", email_address: "", currency_code: "USD" } end