README.md in rails-settings-cached-2.3.5 vs README.md in rails-settings-cached-2.4.0

@@ -124,11 +124,10 @@
 {
   sender_email: "[e-mail]"
 }
 ```
 
-
 ### Get defined fields
 
 > version 2.3+
 
 ```rb
@@ -149,11 +148,11 @@
 => { key: "host", type: :string, default: "http://example.com", readonly: true }
 Setting.get_field("app_name")
 => { key: "app_name", type: :string, default: "Rails Settings", readonly: false }
 ```
 
-## Use Setting in Rails initalizing:
+## Use Setting in Rails initializing:
 
 In `version 2.3+` we allows you to use Setting before Rails is initialized.
 
 For example `config/initializers/devise.rb`
 
@@ -172,14 +171,13 @@
 end
 ```
 
 ## Readonly field
 
-You may also want use Setting in these locations:
+You may also want use Setting before Rails initialize:
 
 ```
-config/application.rb
 config/environments/*.rb
 ```
 
 If you want do that do that, the setting field must has `readonly: true`.
 
@@ -198,28 +196,33 @@
     enable_starttls_auto: ENV["mailer_options.enable_starttls_auto"]
   }
 end
 ```
 
+config/environments/production.rb
+
 ```rb
+# You must require_relative directly in Rails 6.1+ in config/environments/production.rb
+require_relative "../../app/models/setting"
+
 Rails.application.configure do
   config.action_mailer.delivery_method = :smtp
   config.action_mailer.smtp_settings = Setting.mailer_options.deep_symbolize_keys
 end
 ```
 
-### Caching flow:
+## Caching flow:
 
 ```
 Setting.host -> Check Cache -> Exist - Get value of key for cache -> Return
                    |
                 Fetch all key and values from DB -> Write Cache -> Get value of key for cache -> return
                    |
                 Return default value or nil
 ```
 
-In each Setting keys call, we will load the cache/db and save in [RequestStore](https://github.com/steveklabnik/request_store) to avoid hit cache/db.
+In each Setting keys call, we will load the cache/db and save in [ActiveSupport::CurrentAttributes](https://api.rubyonrails.org/classes/ActiveSupport/CurrentAttributes.html) to avoid hit cache/db.
 
 Each key update will expire the cache, so do not add some frequent update key.
 
 ## Change cache key
 
@@ -240,11 +243,11 @@
     Setting.clear_cache
   end
 end
 ```
 
------
+---
 
 ## How to manage Settings in the admin interface?
 
 If you want to create an admin interface to editing the Settings, you can try methods in following:
 
@@ -254,23 +257,20 @@
 namespace :admin do
   resource :settings
 end
 ```
 
-
 app/controllers/admin/settings_controller.rb
 
 ```rb
 module Admin
   class SettingsController < ApplicationController
-    before_action :get_setting, only: [:edit, :update]
-
     def create
       setting_params.keys.each do |key|
         Setting.send("#{key}=", setting_params[key].strip) unless setting_params[key].nil?
       end
-      redirect_to settings_path, notice: "Setting was successfully updated."
+      redirect_to admin_settings_path, notice: "Setting was successfully updated."
     end
 
     private
       def setting_params
         params.require(:setting).permit(:host, :user_limits, :admin_emails,
@@ -350,8 +350,7 @@
 - [siwapp/siwapp](https://github.com/siwapp/siwapp) - 2.x
 - [aidewoode/black_candy](https://github.com/aidewoode/black_candy) - 2.x
 - [thebluedoc/bluedoc](https://github.com/thebluedoc/bluedoc/blob/master/app/models/setting.rb) - 2.x
 - [tootsuite/mastodon](https://github.com/tootsuite/mastodon) - 0.6.x
 - [helpyio/helpy](https://github.com/helpyio/helpy) - 0.5.x
-
 
 And more than [1K repositories](https://github.com/huacnlee/rails-settings-cached/network/dependents) used.