diff --git a/example/Gemfile b/example/Gemfile
index cacf5aff..a900cfa8 100644
--- a/example/Gemfile
+++ b/example/Gemfile
@@ -1,16 +1,19 @@
 source 'https://rubygems.org'
 
-ruby '2.3.3'
+ruby '3.0.6'
 
-gem 'rack-cors', :require => 'rack/cors'
-gem 'rails', '4.2.5.1'
+gem 'rack-cors', require: 'rack/cors'
+gem 'rails', '6.1.6'
 gem 'sqlite3'
 gem 'spring', group: :development
-gem 'raddocs', '0.4.0'
+gem 'raddocs', '2.3.0', github: 'goodylabs/raddocs'
+gem "sprockets-rails"
+gem "sprockets", "~> 3.7.0"
+gem 'thin'
 
 group :test, :development do
   gem 'byebug'
   gem 'awesome_print'
   gem 'rspec-rails'
-  gem 'rspec_api_documentation', :path => "../"
+  gem 'rspec_api_documentation', path: "../"
 end
diff --git a/example/Gemfile.lock b/example/Gemfile.lock
index fd2e4eef..a139ba30 100644
--- a/example/Gemfile.lock
+++ b/example/Gemfile.lock
@@ -1,7 +1,16 @@
+GIT
+  remote: https://github.com/goodylabs/raddocs.git
+  revision: c44571303c567dd2ffb6d54b2fe9df5ba3e1a12f
+  specs:
+    raddocs (2.3.0)
+      haml (>= 4.0)
+      json
+      sinatra (~> 2.0)
+
 PATH
   remote: ..
   specs:
-    rspec_api_documentation (5.1.0)
+    rspec_api_documentation (6.1.0)
       activesupport (>= 3.0.0)
       mustache (~> 1.0, >= 0.99.4)
       rspec (~> 3.0)
@@ -9,154 +18,219 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    actionmailer (4.2.5.1)
-      actionpack (= 4.2.5.1)
-      actionview (= 4.2.5.1)
-      activejob (= 4.2.5.1)
+    actioncable (6.1.6)
+      actionpack (= 6.1.6)
+      activesupport (= 6.1.6)
+      nio4r (~> 2.0)
+      websocket-driver (>= 0.6.1)
+    actionmailbox (6.1.6)
+      actionpack (= 6.1.6)
+      activejob (= 6.1.6)
+      activerecord (= 6.1.6)
+      activestorage (= 6.1.6)
+      activesupport (= 6.1.6)
+      mail (>= 2.7.1)
+    actionmailer (6.1.6)
+      actionpack (= 6.1.6)
+      actionview (= 6.1.6)
+      activejob (= 6.1.6)
+      activesupport (= 6.1.6)
       mail (~> 2.5, >= 2.5.4)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-    actionpack (4.2.5.1)
-      actionview (= 4.2.5.1)
-      activesupport (= 4.2.5.1)
-      rack (~> 1.6)
-      rack-test (~> 0.6.2)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-      rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (4.2.5.1)
-      activesupport (= 4.2.5.1)
-      builder (~> 3.1)
-      erubis (~> 2.7.0)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-      rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    activejob (4.2.5.1)
-      activesupport (= 4.2.5.1)
-      globalid (>= 0.3.0)
-    activemodel (4.2.5.1)
-      activesupport (= 4.2.5.1)
+      rails-dom-testing (~> 2.0)
+    actionpack (6.1.6)
+      actionview (= 6.1.6)
+      activesupport (= 6.1.6)
+      rack (~> 2.0, >= 2.0.9)
+      rack-test (>= 0.6.3)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.0, >= 1.2.0)
+    actiontext (6.1.6)
+      actionpack (= 6.1.6)
+      activerecord (= 6.1.6)
+      activestorage (= 6.1.6)
+      activesupport (= 6.1.6)
+      nokogiri (>= 1.8.5)
+    actionview (6.1.6)
+      activesupport (= 6.1.6)
       builder (~> 3.1)
-    activerecord (4.2.5.1)
-      activemodel (= 4.2.5.1)
-      activesupport (= 4.2.5.1)
-      arel (~> 6.0)
-    activesupport (4.2.5.1)
-      i18n (~> 0.7)
-      json (~> 1.7, >= 1.7.7)
-      minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
-      tzinfo (~> 1.1)
-    arel (6.0.3)
-    awesome_print (1.7.0)
-    builder (3.2.2)
-    byebug (9.0.6)
-    concurrent-ruby (1.0.0)
-    diff-lcs (1.2.5)
-    erubis (2.7.0)
-    globalid (0.3.6)
-      activesupport (>= 4.1.0)
-    haml (4.0.7)
+      erubi (~> 1.4)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.1, >= 1.2.0)
+    activejob (6.1.6)
+      activesupport (= 6.1.6)
+      globalid (>= 0.3.6)
+    activemodel (6.1.6)
+      activesupport (= 6.1.6)
+    activerecord (6.1.6)
+      activemodel (= 6.1.6)
+      activesupport (= 6.1.6)
+    activestorage (6.1.6)
+      actionpack (= 6.1.6)
+      activejob (= 6.1.6)
+      activerecord (= 6.1.6)
+      activesupport (= 6.1.6)
+      marcel (~> 1.0)
+      mini_mime (>= 1.1.0)
+    activesupport (6.1.6)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+      zeitwerk (~> 2.3)
+    awesome_print (1.9.2)
+    builder (3.2.4)
+    byebug (11.1.3)
+    concurrent-ruby (1.2.3)
+    crass (1.0.6)
+    daemons (1.4.1)
+    date (3.3.4)
+    diff-lcs (1.5.1)
+    erubi (1.12.0)
+    eventmachine (1.2.7)
+    globalid (1.2.1)
+      activesupport (>= 6.1)
+    haml (6.3.0)
+      temple (>= 0.8.2)
+      thor
       tilt
-    i18n (0.7.0)
-    json (1.8.3)
-    loofah (2.0.3)
-      nokogiri (>= 1.5.9)
-    mail (2.6.3)
-      mime-types (>= 1.16, < 3)
-    mime-types (2.99)
-    mini_portile2 (2.0.0)
-    minitest (5.8.4)
-    mustache (1.0.5)
-    nokogiri (1.6.7.2)
-      mini_portile2 (~> 2.0.0.rc2)
-    rack (1.6.4)
-    rack-cors (0.4.1)
-    rack-protection (1.5.5)
+    i18n (1.14.3)
+      concurrent-ruby (~> 1.0)
+      racc (~> 1.7)
+    json (2.7.1)
+    loofah (2.22.0)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.12.0)
+    mail (2.8.1)
+      mini_mime (>= 0.1.1)
+      net-imap
+      net-pop
+      net-smtp
+    marcel (1.0.4)
+    method_source (1.0.0)
+    mini_mime (1.1.5)
+    minitest (5.22.2)
+    mustache (1.1.1)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
+    net-imap (0.4.10)
+      date
+      net-protocol
+    net-pop (0.1.2)
+      net-protocol
+    net-protocol (0.2.2)
+      timeout
+    net-smtp (0.4.0.1)
+      net-protocol
+    nio4r (2.7.0)
+    nokogiri (1.16.2-x86_64-linux)
+      racc (~> 1.4)
+    racc (1.7.3)
+    rack (2.2.8.1)
+    rack-cors (2.0.2)
+      rack (>= 2.0.0)
+    rack-protection (2.2.4)
       rack
-    rack-test (0.6.3)
-      rack (>= 1.0)
-    raddocs (0.4.0)
-      haml (~> 4.0, >= 4.0.4)
-      json (~> 1.8, >= 1.8.1)
-      sinatra (~> 1.3, >= 1.3.0)
-    rails (4.2.5.1)
-      actionmailer (= 4.2.5.1)
-      actionpack (= 4.2.5.1)
-      actionview (= 4.2.5.1)
-      activejob (= 4.2.5.1)
-      activemodel (= 4.2.5.1)
-      activerecord (= 4.2.5.1)
-      activesupport (= 4.2.5.1)
-      bundler (>= 1.3.0, < 2.0)
-      railties (= 4.2.5.1)
-      sprockets-rails
-    rails-deprecated_sanitizer (1.0.3)
-      activesupport (>= 4.2.0.alpha)
-    rails-dom-testing (1.0.7)
-      activesupport (>= 4.2.0.beta, < 5.0)
-      nokogiri (~> 1.6.0)
-      rails-deprecated_sanitizer (>= 1.0.1)
-    rails-html-sanitizer (1.0.3)
-      loofah (~> 2.0)
-    railties (4.2.5.1)
-      actionpack (= 4.2.5.1)
-      activesupport (= 4.2.5.1)
-      rake (>= 0.8.7)
-      thor (>= 0.18.1, < 2.0)
-    rake (10.5.0)
-    rspec (3.0.0)
-      rspec-core (~> 3.0.0)
-      rspec-expectations (~> 3.0.0)
-      rspec-mocks (~> 3.0.0)
-    rspec-core (3.0.4)
-      rspec-support (~> 3.0.0)
-    rspec-expectations (3.0.4)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rails (6.1.6)
+      actioncable (= 6.1.6)
+      actionmailbox (= 6.1.6)
+      actionmailer (= 6.1.6)
+      actionpack (= 6.1.6)
+      actiontext (= 6.1.6)
+      actionview (= 6.1.6)
+      activejob (= 6.1.6)
+      activemodel (= 6.1.6)
+      activerecord (= 6.1.6)
+      activestorage (= 6.1.6)
+      activesupport (= 6.1.6)
+      bundler (>= 1.15.0)
+      railties (= 6.1.6)
+      sprockets-rails (>= 2.0.0)
+    rails-dom-testing (2.2.0)
+      activesupport (>= 5.0.0)
+      minitest
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.6.0)
+      loofah (~> 2.21)
+      nokogiri (~> 1.14)
+    railties (6.1.6)
+      actionpack (= 6.1.6)
+      activesupport (= 6.1.6)
+      method_source
+      rake (>= 12.2)
+      thor (~> 1.0)
+    rake (13.1.0)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.0)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.0.0)
-    rspec-mocks (3.0.4)
-      rspec-support (~> 3.0.0)
-    rspec-rails (3.0.2)
-      actionpack (>= 3.0)
-      activesupport (>= 3.0)
-      railties (>= 3.0)
-      rspec-core (~> 3.0.0)
-      rspec-expectations (~> 3.0.0)
-      rspec-mocks (~> 3.0.0)
-      rspec-support (~> 3.0.0)
-    rspec-support (3.0.4)
-    sinatra (1.4.8)
-      rack (~> 1.5)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
-    spring (1.1.3)
-    sprockets (3.5.2)
+      rspec-support (~> 3.13.0)
+    rspec-rails (6.1.1)
+      actionpack (>= 6.1)
+      activesupport (>= 6.1)
+      railties (>= 6.1)
+      rspec-core (~> 3.12)
+      rspec-expectations (~> 3.12)
+      rspec-mocks (~> 3.12)
+      rspec-support (~> 3.12)
+    rspec-support (3.13.1)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.4)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.4)
+      tilt (~> 2.0)
+    spring (4.1.3)
+    sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
-    sprockets-rails (3.0.1)
-      actionpack (>= 4.0)
-      activesupport (>= 4.0)
+    sprockets-rails (3.4.2)
+      actionpack (>= 5.2)
+      activesupport (>= 5.2)
       sprockets (>= 3.0.0)
-    sqlite3 (1.3.9)
-    thor (0.19.1)
-    thread_safe (0.3.5)
-    tilt (2.0.8)
-    tzinfo (1.2.2)
-      thread_safe (~> 0.1)
+    sqlite3 (1.7.2-x86_64-linux)
+    temple (0.10.3)
+    thin (1.8.2)
+      daemons (~> 1.0, >= 1.0.9)
+      eventmachine (~> 1.0, >= 1.0.4)
+      rack (>= 1, < 3)
+    thor (1.3.1)
+    tilt (2.3.0)
+    timeout (0.4.1)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
+    websocket-driver (0.7.6)
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.5)
+    zeitwerk (2.6.13)
 
 PLATFORMS
-  ruby
+  x86_64-linux
 
 DEPENDENCIES
   awesome_print
   byebug
   rack-cors
-  raddocs (= 0.4.0)
-  rails (= 4.2.5.1)
+  raddocs (= 2.3.0)!
+  rails (= 6.1.6)
   rspec-rails
   rspec_api_documentation!
   spring
+  sprockets (~> 3.7.0)
+  sprockets-rails
   sqlite3
+  thin
 
 RUBY VERSION
-   ruby 2.3.3p222
+   ruby 3.0.6p216
 
 BUNDLED WITH
-   1.16.3
+   2.4.15
diff --git a/example/app/controllers/orders_controller.rb b/example/app/controllers/orders_controller.rb
index 9ec2f703..d89c5cb5 100644
--- a/example/app/controllers/orders_controller.rb
+++ b/example/app/controllers/orders_controller.rb
@@ -4,7 +4,7 @@ class OrdersController < ApplicationController
   end
 
   def index
-    render :json => Order.all
+    render json: Order.all
   end
 
   def show
@@ -18,13 +18,13 @@ def show
 
   def create
     order = Order.create(order_params)
-    render :json => order, :status => 201, :location => order_url(order)
+    render json: order, status: 201, location: order_url(order)
   end
 
   def update
     order = Order.find(params[:id])
     order.update(order_params)
-    render :nothing => true, :status => 204
+    head 204
   end
 
   def destroy
diff --git a/example/bin/rails b/example/bin/rails
index 7feb6a30..21d3e02d 100755
--- a/example/bin/rails
+++ b/example/bin/rails
@@ -1,8 +1,5 @@
 #!/usr/bin/env ruby
-begin
-  load File.expand_path("../spring", __FILE__)
-rescue LoadError
-end
-APP_PATH = File.expand_path('../../config/application',  __FILE__)
-require_relative '../config/boot'
-require 'rails/commands'
+load File.expand_path("spring", __dir__)
+APP_PATH = File.expand_path('../config/application', __dir__)
+require_relative "../config/boot"
+require "rails/commands"
diff --git a/example/bin/rake b/example/bin/rake
index 8017a027..7327f471 100755
--- a/example/bin/rake
+++ b/example/bin/rake
@@ -1,8 +1,5 @@
 #!/usr/bin/env ruby
-begin
-  load File.expand_path("../spring", __FILE__)
-rescue LoadError
-end
-require_relative '../config/boot'
-require 'rake'
+load File.expand_path("spring", __dir__)
+require_relative "../config/boot"
+require "rake"
 Rake.application.run
diff --git a/example/bin/setup b/example/bin/setup
new file mode 100755
index 00000000..57923026
--- /dev/null
+++ b/example/bin/setup
@@ -0,0 +1,33 @@
+#!/usr/bin/env ruby
+require "fileutils"
+
+# path to your application root.
+APP_ROOT = File.expand_path('..', __dir__)
+
+def system!(*args)
+  system(*args) || abort("\n== Command #{args} failed ==")
+end
+
+FileUtils.chdir APP_ROOT do
+  # This script is a way to set up or update your development environment automatically.
+  # This script is idempotent, so that you can run it at any time and get an expectable outcome.
+  # Add necessary setup steps to this file.
+
+  puts '== Installing dependencies =='
+  system! 'gem install bundler --conservative'
+  system('bundle check') || system!('bundle install')
+
+  # puts "\n== Copying sample files =="
+  # unless File.exist?('config/database.yml')
+  #   FileUtils.cp 'config/database.yml.sample', 'config/database.yml'
+  # end
+
+  puts "\n== Preparing database =="
+  system! 'bin/rails db:prepare'
+
+  puts "\n== Removing old logs and tempfiles =="
+  system! 'bin/rails log:clear tmp:clear'
+
+  puts "\n== Restarting application server =="
+  system! 'bin/rails restart'
+end
diff --git a/example/bin/spring b/example/bin/spring
index 253ec37c..b4147e84 100755
--- a/example/bin/spring
+++ b/example/bin/spring
@@ -1,18 +1,14 @@
 #!/usr/bin/env ruby
-
-# This file loads spring without using Bundler, in order to be fast
-# It gets overwritten when you run the `spring binstub` command
-
-unless defined?(Spring)
-  require "rubygems"
+if !defined?(Spring) && [nil, "development", "test"].include?(ENV["RAILS_ENV"])
+  gem "bundler"
   require "bundler"
 
-  if match = Bundler.default_lockfile.read.match(/^GEM$.*?^    spring \((.*?)\)$.*?^$/m)
-    ENV["GEM_PATH"] = ([Bundler.bundle_path.to_s] + Gem.path).join(File::PATH_SEPARATOR)
-    ENV["GEM_HOME"] = ""
-    Gem.paths = ENV
-
-    gem "spring", match[1]
+  # Load Spring without loading other gems in the Gemfile, for speed.
+  Bundler.locked_gems&.specs&.find { |spec| spec.name == "spring" }&.tap do |spring|
+    Gem.use_paths Gem.dir, Bundler.bundle_path.to_s, *Gem.path
+    gem "spring", spring.version
     require "spring/binstub"
+  rescue Gem::LoadError
+    # Ignore when Spring is not installed.
   end
 end
diff --git a/example/config.ru b/example/config.ru
index 5bc2a619..4a3c09a6 100644
--- a/example/config.ru
+++ b/example/config.ru
@@ -1,4 +1,6 @@
 # This file is used by Rack-based servers to start the application.
 
-require ::File.expand_path('../config/environment',  __FILE__)
+require_relative "config/environment"
+
 run Rails.application
+Rails.application.load_server
diff --git a/example/config/application.rb b/example/config/application.rb
index 26647b9d..e3c04507 100644
--- a/example/config/application.rb
+++ b/example/config/application.rb
@@ -1,11 +1,17 @@
-require File.expand_path('../boot', __FILE__)
+require_relative "boot"
 
+require "rails"
 # Pick the frameworks you want:
 require "active_model/railtie"
+require "active_job/railtie"
 require "active_record/railtie"
+# require "active_storage/engine"
 require "action_controller/railtie"
 require "action_mailer/railtie"
+# require "action_mailbox/engine"
+# require "action_text/engine"
 require "action_view/railtie"
+# require "action_cable/engine"
 require "sprockets/railtie"
 # require "rails/test_unit/railtie"
 
@@ -15,24 +21,15 @@
 
 module Example
   class Application < Rails::Application
+    # Initialize configuration defaults for originally generated Rails version.
+    config.load_defaults 5.0
 
-    config.middleware.insert_before 0, 'Rack::Cors' do
-      allow do
-        origins '*'
-        resource '*', :headers => :any, :methods => [:get, :post, :options, :put, :patch, :delete, :head]
-      end
-    end
-
-    # Settings in config/environments/* take precedence over those specified here.
-    # Application configuration should go into files in config/initializers
-    # -- all .rb files in that directory are automatically loaded.
-
-    # Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.
-    # Run "rake -D time" for a list of tasks for finding time zone names. Default is UTC.
-    # config.time_zone = 'Central Time (US & Canada)'
-
-    # The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded.
-    # config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}').to_s]
-    # config.i18n.default_locale = :de
+    # Configuration for the application, engines, and railties goes here.
+    #
+    # These settings can be overridden in specific environments using the files
+    # in config/environments, which are processed later.
+    #
+    # config.time_zone = "Central Time (US & Canada)"
+    # config.eager_load_paths << Rails.root.join("extras")
   end
 end
diff --git a/example/config/boot.rb b/example/config/boot.rb
index 5e5f0c1f..d69bd27d 100644
--- a/example/config/boot.rb
+++ b/example/config/boot.rb
@@ -1,4 +1,3 @@
-# Set up gems listed in the Gemfile.
-ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile', __FILE__)
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
 
-require 'bundler/setup' if File.exist?(ENV['BUNDLE_GEMFILE'])
+require "bundler/setup" # Set up gems listed in the Gemfile.
diff --git a/example/config/environment.rb b/example/config/environment.rb
index ee8d90dc..e6dfbfad 100644
--- a/example/config/environment.rb
+++ b/example/config/environment.rb
@@ -1,5 +1,6 @@
 # Load the Rails application.
-require File.expand_path('../application', __FILE__)
+# require_relative "application"
+require File.expand_path("../application", __FILE__)
 
 # Initialize the Rails application.
 Rails.application.initialize!
diff --git a/example/config/environments/development.rb b/example/config/environments/development.rb
index ddf0e90c..4aa50264 100644
--- a/example/config/environments/development.rb
+++ b/example/config/environments/development.rb
@@ -1,27 +1,58 @@
+require "active_support/core_ext/integer/time"
+
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
-  # In the development environment your application's code is reloaded on
-  # every request. This slows down response time but is perfect for development
+  # In the development environment your application's code is reloaded any time
+  # it changes. This slows down response time but is perfect for development
   # since you don't have to restart the web server when you make code changes.
   config.cache_classes = false
 
   # Do not eager load code on boot.
   config.eager_load = false
 
-  # Show full error reports and disable caching.
-  config.consider_all_requests_local       = true
+  # Show full error reports.
+  config.consider_all_requests_local = true
+
+  # and disable caching.
   config.action_controller.perform_caching = false
 
+  # Enable/disable caching. By default caching is disabled.
+  # Run rails dev:cache to toggle caching.
+  if Rails.root.join('tmp', 'caching-dev.txt').exist?
+    config.action_controller.perform_caching = true
+    config.action_controller.enable_fragment_cache_logging = true
+
+    config.cache_store = :memory_store
+    config.public_file_server.headers = {
+      'Cache-Control' => "public, max-age=#{2.days.to_i}"
+    }
+  else
+    config.action_controller.perform_caching = false
+
+    config.cache_store = :null_store
+  end
+
   # Don't care if the mailer can't send.
   config.action_mailer.raise_delivery_errors = false
 
+  config.action_mailer.perform_caching = false
+
   # Print deprecation notices to the Rails logger.
   config.active_support.deprecation = :log
 
+  # Raise exceptions for disallowed deprecations.
+  config.active_support.disallowed_deprecation = :raise
+
+  # Tell Active Support which deprecation messages to disallow.
+  config.active_support.disallowed_deprecation_warnings = []
+
   # Raise an error on page load if there are pending migrations.
   config.active_record.migration_error = :page_load
 
+  # Highlight code that triggered database queries in logs.
+  config.active_record.verbose_query_logs = true
+
   # Debug mode disables concatenation and preprocessing of assets.
   # This option may cause significant delays in view rendering with a large
   # number of complex assets.
@@ -32,6 +63,19 @@
   # Raises helpful error messages.
   config.assets.raise_runtime_errors = true
 
-  # Raises error for missing translations
-  # config.action_view.raise_on_missing_translations = true
+  # Suppress logger output for asset requests.
+  config.assets.quiet = true
+
+  # Raises error for missing translations.
+  # config.i18n.raise_on_missing_translations = true
+
+  # Annotate rendered view with file names.
+  # config.action_view.annotate_rendered_view_with_filenames = true
+
+  # Use an evented file watcher to asynchronously detect changes in source code,
+  # routes, locales, etc. This feature depends on the listen gem.
+  # config.file_watcher = ActiveSupport::EventedFileUpdateChecker
+
+  # Uncomment if you wish to allow Action Cable access from any origin.
+  # config.action_cable.disable_request_forgery_protection = true
 end
diff --git a/example/config/environments/production.rb b/example/config/environments/production.rb
index 47d3553b..12feaf07 100644
--- a/example/config/environments/production.rb
+++ b/example/config/environments/production.rb
@@ -1,3 +1,5 @@
+require "active_support/core_ext/integer/time"
+
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
@@ -14,21 +16,34 @@
   config.consider_all_requests_local       = false
   config.action_controller.perform_caching = true
 
+  # Ensures that a master key has been made available in either ENV["RAILS_MASTER_KEY"]
+  # or in config/master.key. This key is used to decrypt credentials (and other encrypted files).
+  # config.require_master_key = true
+
   # Enable Rack::Cache to put a simple HTTP cache in front of your application
   # Add `rack-cache` to your Gemfile before enabling this.
   # For large-scale production use, consider using a caching reverse proxy like nginx, varnish or squid.
   # config.action_dispatch.rack_cache = true
 
+  # Disable serving static files from the `/public` folder by default since
+  # Apache or NGINX already handles this.
+  config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?
+
   # Disable Rails's static asset server (Apache or nginx will already do this).
   config.serve_static_assets = false
 
   # Compress JavaScripts and CSS.
   config.assets.js_compressor = :uglifier
+
+  # Compress CSS using a preprocessor.
   # config.assets.css_compressor = :sass
 
   # Do not fallback to assets pipeline if a precompiled asset is missed.
   config.assets.compile = false
 
+  # Enable serving of images, stylesheets, and JavaScripts from an asset server.
+  # config.asset_host = 'http://assets.example.com'
+
   # Generate digests for assets URLs.
   config.assets.digest = true
 
@@ -36,17 +51,20 @@
   config.assets.version = '1.0'
 
   # Specifies the header that your server uses for sending files.
-  # config.action_dispatch.x_sendfile_header = "X-Sendfile" # for apache
-  # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for nginx
+  # config.action_dispatch.x_sendfile_header = 'X-Sendfile' # for Apache
+  # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for NGINX
 
   # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
   # config.force_ssl = true
 
   # Set to :debug to see everything in the log.
+  # Include generic and useful information about system operation, but avoid logging too much
+  # information to avoid inadvertent exposure of personally identifiable information (PII).
   config.log_level = :info
 
   # Prepend all log lines with the following tags.
   # config.log_tags = [ :subdomain, :uuid ]
+  config.log_tags = [ :request_id ]
 
   # Use a different logger for distributed setups.
   # config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)
@@ -57,9 +75,14 @@
   # Enable serving of images, stylesheets, and JavaScripts from an asset server.
   # config.action_controller.asset_host = "http://assets.example.com"
 
+  # Use a real queuing backend for Active Job (and separate queues per environment).
+  # config.active_job.queue_adapter     = :resque
+  # config.active_job.queue_name_prefix = "example_production"
+
   # Precompile additional assets.
   # application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
   # config.assets.precompile += %w( search.js )
+  config.action_mailer.perform_caching = false
 
   # Ignore bad email addresses and do not raise email delivery errors.
   # Set this to true and configure the email server for immediate delivery to raise delivery errors.
@@ -75,9 +98,46 @@
   # Disable automatic flushing of the log to improve performance.
   # config.autoflush_log = false
 
+  # Log disallowed deprecations.
+  config.active_support.disallowed_deprecation = :log
+
+  # Tell Active Support which deprecation messages to disallow.
+  config.active_support.disallowed_deprecation_warnings = []
+
   # Use default logging formatter so that PID and timestamp are not suppressed.
   config.log_formatter = ::Logger::Formatter.new
 
+  # Use a different logger for distributed setups.
+  # require "syslog/logger"
+  # config.logger = ActiveSupport::TaggedLogging.new(Syslog::Logger.new 'app-name')
+
+  if ENV["RAILS_LOG_TO_STDOUT"].present?
+    logger           = ActiveSupport::Logger.new(STDOUT)
+    logger.formatter = config.log_formatter
+    config.logger    = ActiveSupport::TaggedLogging.new(logger)
+  end
+
   # Do not dump schema after migrations.
   config.active_record.dump_schema_after_migration = false
+
+  # Inserts middleware to perform automatic connection switching.
+  # The `database_selector` hash is used to pass options to the DatabaseSelector
+  # middleware. The `delay` is used to determine how long to wait after a write
+  # to send a subsequent read to the primary.
+  #
+  # The `database_resolver` class is used by the middleware to determine which
+  # database is appropriate to use based on the time delay.
+  #
+  # The `database_resolver_context` class is used by the middleware to set
+  # timestamps for the last write to the primary. The resolver uses the context
+  # class timestamps to determine how long to wait before reading from the
+  # replica.
+  #
+  # By default Rails will store a last write timestamp in the session. The
+  # DatabaseSelector middleware is designed as such you can define your own
+  # strategy for connection switching and pass that into the middleware through
+  # these configuration options.
+  # config.active_record.database_selector = { delay: 2.seconds }
+  # config.active_record.database_resolver = ActiveRecord::Middleware::DatabaseSelector::Resolver
+  # config.active_record.database_resolver_context = ActiveRecord::Middleware::DatabaseSelector::Resolver::Session
 end
diff --git a/example/config/environments/test.rb b/example/config/environments/test.rb
index 053f5b66..70791305 100644
--- a/example/config/environments/test.rb
+++ b/example/config/environments/test.rb
@@ -1,24 +1,31 @@
+require "active_support/core_ext/integer/time"
+
+# The test environment is used exclusively to run your application's
+# test suite. You never need to work with it otherwise. Remember that
+# your test database is "scratch space" for the test suite and is wiped
+# and recreated between test runs. Don't rely on the data there!
+
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
-  # The test environment is used exclusively to run your application's
-  # test suite. You never need to work with it otherwise. Remember that
-  # your test database is "scratch space" for the test suite and is wiped
-  # and recreated between test runs. Don't rely on the data there!
-  config.cache_classes = true
+  config.cache_classes = false
+  config.action_view.cache_template_loading = true
 
   # Do not eager load code on boot. This avoids loading your whole application
   # just for the purpose of running a single test. If you are using a tool that
   # preloads Rails for running tests, you may have to set it to true.
   config.eager_load = false
 
-  # Configure static asset server for tests with Cache-Control for performance.
-  config.serve_static_assets  = true
-  config.static_cache_control = 'public, max-age=3600'
+  # Configure public file server for tests with Cache-Control for performance.
+  config.public_file_server.enabled = true
+  config.public_file_server.headers = {
+    'Cache-Control' => "public, max-age=#{1.hour.to_i}"
+  }
 
   # Show full error reports and disable caching.
   config.consider_all_requests_local       = true
   config.action_controller.perform_caching = false
+  config.cache_store = :null_store
 
   # Raise exceptions instead of rendering exception templates.
   config.action_dispatch.show_exceptions = false
@@ -26,6 +33,8 @@
   # Disable request forgery protection in test environment.
   config.action_controller.allow_forgery_protection = false
 
+  config.action_mailer.perform_caching = false
+
   # Tell Action Mailer not to deliver emails to the real world.
   # The :test delivery method accumulates sent emails in the
   # ActionMailer::Base.deliveries array.
@@ -34,6 +43,15 @@
   # Print deprecation notices to the stderr.
   config.active_support.deprecation = :stderr
 
-  # Raises error for missing translations
-  # config.action_view.raise_on_missing_translations = true
+  # Raise exceptions for disallowed deprecations.
+  config.active_support.disallowed_deprecation = :raise
+
+  # Tell Active Support which deprecation messages to disallow.
+  config.active_support.disallowed_deprecation_warnings = []
+
+  # Raises error for missing translations.
+  # config.i18n.raise_on_missing_translations = true
+
+  # Annotate rendered view with file names.
+  # config.action_view.annotate_rendered_view_with_filenames = true
 end
diff --git a/example/config/initializers/application_controller_renderer.rb b/example/config/initializers/application_controller_renderer.rb
new file mode 100644
index 00000000..89d2efab
--- /dev/null
+++ b/example/config/initializers/application_controller_renderer.rb
@@ -0,0 +1,8 @@
+# Be sure to restart your server when you modify this file.
+
+# ActiveSupport::Reloader.to_prepare do
+#   ApplicationController.renderer.defaults.merge!(
+#     http_host: 'example.org',
+#     https: false
+#   )
+# end
diff --git a/example/config/initializers/assets.rb b/example/config/initializers/assets.rb
new file mode 100644
index 00000000..fe48fc34
--- /dev/null
+++ b/example/config/initializers/assets.rb
@@ -0,0 +1,12 @@
+# Be sure to restart your server when you modify this file.
+
+# Version of your assets, change this if you want to expire all your assets.
+Rails.application.config.assets.version = '1.0'
+
+# Add additional assets to the asset load path.
+# Rails.application.config.assets.paths << Emoji.images_path
+
+# Precompile additional assets.
+# application.js, application.css, and all non-JS/CSS in the app/assets
+# folder are already added.
+# Rails.application.config.assets.precompile += %w( admin.js admin.css )
diff --git a/example/config/initializers/backtrace_silencers.rb b/example/config/initializers/backtrace_silencers.rb
index 59385cdf..33699c30 100644
--- a/example/config/initializers/backtrace_silencers.rb
+++ b/example/config/initializers/backtrace_silencers.rb
@@ -1,7 +1,8 @@
 # Be sure to restart your server when you modify this file.
 
 # You can add backtrace silencers for libraries that you're using but don't wish to see in your backtraces.
-# Rails.backtrace_cleaner.add_silencer { |line| line =~ /my_noisy_library/ }
+# Rails.backtrace_cleaner.add_silencer { |line| /my_noisy_library/.match?(line) }
 
-# You can also remove all the silencers if you're trying to debug a problem that might stem from framework code.
-# Rails.backtrace_cleaner.remove_silencers!
+# You can also remove all the silencers if you're trying to debug a problem that might stem from framework code
+# by setting BACKTRACE=1 before calling your invocation, like "BACKTRACE=1 ./bin/rails runner 'MyClass.perform'".
+Rails.backtrace_cleaner.remove_silencers! if ENV["BACKTRACE"]
diff --git a/example/config/initializers/content_security_policy.rb b/example/config/initializers/content_security_policy.rb
new file mode 100644
index 00000000..41c43016
--- /dev/null
+++ b/example/config/initializers/content_security_policy.rb
@@ -0,0 +1,28 @@
+# Be sure to restart your server when you modify this file.
+
+# Define an application-wide content security policy
+# For further information see the following documentation
+# https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy
+
+# Rails.application.config.content_security_policy do |policy|
+#   policy.default_src :self, :https
+#   policy.font_src    :self, :https, :data
+#   policy.img_src     :self, :https, :data
+#   policy.object_src  :none
+#   policy.script_src  :self, :https
+#   policy.style_src   :self, :https
+
+#   # Specify URI for violation reports
+#   # policy.report_uri "/csp-violation-report-endpoint"
+# end
+
+# If you are using UJS then enable automatic nonce generation
+# Rails.application.config.content_security_policy_nonce_generator = -> request { SecureRandom.base64(16) }
+
+# Set the nonce only to specific directives
+# Rails.application.config.content_security_policy_nonce_directives = %w(script-src)
+
+# Report CSP violations to a specified URI
+# For further information see the following documentation:
+# https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Only
+# Rails.application.config.content_security_policy_report_only = true
diff --git a/example/config/initializers/cookies_serializer.rb b/example/config/initializers/cookies_serializer.rb
index 7a06a89f..5a6a32d3 100644
--- a/example/config/initializers/cookies_serializer.rb
+++ b/example/config/initializers/cookies_serializer.rb
@@ -1,3 +1,5 @@
 # Be sure to restart your server when you modify this file.
 
-Rails.application.config.action_dispatch.cookies_serializer = :json
\ No newline at end of file
+# Specify a serializer for the signed and encrypted cookie jars.
+# Valid options are :json, :marshal, and :hybrid.
+Rails.application.config.action_dispatch.cookies_serializer = :json
diff --git a/example/config/initializers/cors.rb b/example/config/initializers/cors.rb
new file mode 100644
index 00000000..ebdf0ee1
--- /dev/null
+++ b/example/config/initializers/cors.rb
@@ -0,0 +1,16 @@
+# Be sure to restart your server when you modify this file.
+
+# Avoid CORS issues when API is called from the frontend app.
+# Handle Cross-Origin Resource Sharing (CORS) in order to accept cross-origin AJAX requests.
+
+# Read more: https://github.com/cyu/rack-cors
+
+Rails.application.config.middleware.insert_before 0, Rack::Cors do
+  allow do
+    origins '*'
+
+    resource '*',
+      headers: :any,
+      methods: [:get, :post, :put, :patch, :delete, :options, :head]
+  end
+end
diff --git a/example/config/initializers/filter_parameter_logging.rb b/example/config/initializers/filter_parameter_logging.rb
index 4a994e1e..4b34a036 100644
--- a/example/config/initializers/filter_parameter_logging.rb
+++ b/example/config/initializers/filter_parameter_logging.rb
@@ -1,4 +1,6 @@
 # Be sure to restart your server when you modify this file.
 
 # Configure sensitive parameters which will be filtered from the log file.
-Rails.application.config.filter_parameters += [:password]
+Rails.application.config.filter_parameters += [
+  :passw, :secret, :token, :_key, :crypt, :salt, :certificate, :otp, :ssn
+]
diff --git a/example/config/initializers/new_framework_defaults_6_1.rb b/example/config/initializers/new_framework_defaults_6_1.rb
new file mode 100644
index 00000000..9526b835
--- /dev/null
+++ b/example/config/initializers/new_framework_defaults_6_1.rb
@@ -0,0 +1,67 @@
+# Be sure to restart your server when you modify this file.
+#
+# This file contains migration options to ease your Rails 6.1 upgrade.
+#
+# Once upgraded flip defaults one by one to migrate to the new default.
+#
+# Read the Guide for Upgrading Ruby on Rails for more info on each option.
+
+# Support for inversing belongs_to -> has_many Active Record associations.
+# Rails.application.config.active_record.has_many_inversing = true
+
+# Track Active Storage variants in the database.
+# Rails.application.config.active_storage.track_variants = true
+
+# Apply random variation to the delay when retrying failed jobs.
+# Rails.application.config.active_job.retry_jitter = 0.15
+
+# Stop executing `after_enqueue`/`after_perform` callbacks if
+# `before_enqueue`/`before_perform` respectively halts with `throw :abort`.
+# Rails.application.config.active_job.skip_after_callbacks_if_terminated = true
+
+# Specify cookies SameSite protection level: either :none, :lax, or :strict.
+#
+# This change is not backwards compatible with earlier Rails versions.
+# It's best enabled when your entire app is migrated and stable on 6.1.
+# Rails.application.config.action_dispatch.cookies_same_site_protection = :lax
+
+# Generate CSRF tokens that are encoded in URL-safe Base64.
+#
+# This change is not backwards compatible with earlier Rails versions.
+# It's best enabled when your entire app is migrated and stable on 6.1.
+# Rails.application.config.action_controller.urlsafe_csrf_tokens = true
+
+# Specify whether `ActiveSupport::TimeZone.utc_to_local` returns a time with an
+# UTC offset or a UTC time.
+# ActiveSupport.utc_to_local_returns_utc_offset_times = true
+
+# Change the default HTTP status code to `308` when redirecting non-GET/HEAD
+# requests to HTTPS in `ActionDispatch::SSL` middleware.
+# Rails.application.config.action_dispatch.ssl_default_redirect_status = 308
+
+# Use new connection handling API. For most applications this won't have any
+# effect. For applications using multiple databases, this new API provides
+# support for granular connection swapping.
+# Rails.application.config.active_record.legacy_connection_handling = false
+
+# Make `form_with` generate non-remote forms by default.
+# Rails.application.config.action_view.form_with_generates_remote_forms = false
+
+# Set the default queue name for the analysis job to the queue adapter default.
+# Rails.application.config.active_storage.queues.analysis = nil
+
+# Set the default queue name for the purge job to the queue adapter default.
+# Rails.application.config.active_storage.queues.purge = nil
+
+# Set the default queue name for the incineration job to the queue adapter default.
+# Rails.application.config.action_mailbox.queues.incineration = nil
+
+# Set the default queue name for the routing job to the queue adapter default.
+# Rails.application.config.action_mailbox.queues.routing = nil
+
+# Set the default queue name for the mail deliver job to the queue adapter default.
+# Rails.application.config.action_mailer.deliver_later_queue_name = nil
+
+# Generate a `Link` header that gives a hint to modern browsers about
+# preloading assets when using `javascript_include_tag` and `stylesheet_link_tag`.
+# Rails.application.config.action_view.preload_links_header = true
diff --git a/example/config/initializers/permissions_policy.rb b/example/config/initializers/permissions_policy.rb
new file mode 100644
index 00000000..00f64d71
--- /dev/null
+++ b/example/config/initializers/permissions_policy.rb
@@ -0,0 +1,11 @@
+# Define an application-wide HTTP permissions policy. For further
+# information see https://developers.google.com/web/updates/2018/06/feature-policy
+#
+# Rails.application.config.permissions_policy do |f|
+#   f.camera      :none
+#   f.gyroscope   :none
+#   f.microphone  :none
+#   f.usb         :none
+#   f.fullscreen  :self
+#   f.payment     :self, "https://secure.example.com"
+# end
diff --git a/example/config/initializers/rspec_api_documentation.rb b/example/config/initializers/rspec_api_documentation.rb
new file mode 100644
index 00000000..3963ffe6
--- /dev/null
+++ b/example/config/initializers/rspec_api_documentation.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+module RspecApiDocumentation
+  class RackTestClient < ClientBase
+    def response_body
+      last_response.body.encode("utf-8")
+    end
+  end
+end
diff --git a/example/config/initializers/wrap_parameters.rb b/example/config/initializers/wrap_parameters.rb
index 33725e95..bbfc3961 100644
--- a/example/config/initializers/wrap_parameters.rb
+++ b/example/config/initializers/wrap_parameters.rb
@@ -5,10 +5,10 @@
 
 # Enable parameter wrapping for JSON. You can disable this by setting :format to an empty array.
 ActiveSupport.on_load(:action_controller) do
-  wrap_parameters format: [:json] if respond_to?(:wrap_parameters)
+  wrap_parameters format: [:json]
 end
 
 # To enable root element in JSON for ActiveRecord objects.
 # ActiveSupport.on_load(:active_record) do
-#  self.include_root_in_json = true
+#   self.include_root_in_json = true
 # end
diff --git a/example/config/locales/en.yml b/example/config/locales/en.yml
index 06539571..cf9b342d 100644
--- a/example/config/locales/en.yml
+++ b/example/config/locales/en.yml
@@ -16,8 +16,18 @@
 #
 # This would use the information in config/locales/es.yml.
 #
+# The following keys must be escaped otherwise they will not be retrieved by
+# the default I18n backend:
+#
+# true, false, on, off, yes, no
+#
+# Instead, surround them with single quotes.
+#
+# en:
+#   'true': 'foo'
+#
 # To learn more, please read the Rails Internationalization guide
-# available at http://guides.rubyonrails.org/i18n.html.
+# available at https://guides.rubyonrails.org/i18n.html.
 
 en:
   hello: "Hello world"
diff --git a/example/config/routes.rb b/example/config/routes.rb
index 47affa09..4a2e7a37 100644
--- a/example/config/routes.rb
+++ b/example/config/routes.rb
@@ -1,7 +1,7 @@
 Rails.application.routes.draw do
   resources :orders
 
-  resources :uploads, :only => :create
+  resources :uploads, only: :create
 
-  mount Raddocs::App => "/docs", :anchor => false
+  mount Raddocs::App => "/docs", anchor: false
 end
diff --git a/example/config/spring.rb b/example/config/spring.rb
new file mode 100644
index 00000000..db5bf130
--- /dev/null
+++ b/example/config/spring.rb
@@ -0,0 +1,6 @@
+Spring.watch(
+  ".ruby-version",
+  ".rbenv-vars",
+  "tmp/restart.txt",
+  "tmp/caching-dev.txt"
+)
diff --git a/example/db/schema.rb b/example/db/schema.rb
index a3b2ef4b..544685d7 100644
--- a/example/db/schema.rb
+++ b/example/db/schema.rb
@@ -1,22 +1,21 @@
-# encoding: UTF-8
 # This file is auto-generated from the current state of the database. Instead
 # of editing this file, please use the migrations feature of Active Record to
 # incrementally modify your database, and then regenerate this schema definition.
 #
-# Note that this schema.rb definition is the authoritative source for your
-# database schema. If you need to create the application database on another
-# system, you should be using db:schema:load, not running all the migrations
-# from scratch. The latter is a flawed and unsustainable approach (the more migrations
-# you'll amass, the slower it'll run and the greater likelihood for issues).
+# This file is the source Rails uses to define your schema when running `bin/rails
+# db:schema:load`. When creating a new database, `bin/rails db:schema:load` tends to
+# be faster and is potentially less error prone than running all of your
+# migrations from scratch. Old migrations may fail to apply correctly if those
+# migrations use external dependencies or application code.
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20140616151047) do
+ActiveRecord::Schema.define(version: 2014_06_16_151047) do
 
   create_table "orders", force: :cascade do |t|
-    t.string   "name"
-    t.boolean  "paid"
-    t.string   "email"
+    t.string "name"
+    t.boolean "paid"
+    t.string "email"
     t.datetime "created_at"
     t.datetime "updated_at"
   end
diff --git a/example/spec/acceptance/orders_spec.rb b/example/spec/acceptance/orders_spec.rb
index 4505aabc..cd279dbe 100644
--- a/example/spec/acceptance/orders_spec.rb
+++ b/example/spec/acceptance/orders_spec.rb
@@ -6,17 +6,17 @@
 
   explanation "Orders are top-level business objects"
 
-  let(:order) { Order.create(:name => "Old Name", :paid => true, :email => "email@example.com") }
+  let(:order) { Order.create(name: "Old Name", paid: true, email: "email@example.com") }
 
   get "/orders" do
-    authentication :apiKey, "API_TOKEN", :name => "AUTH_TOKEN"
+    authentication :apiKey, "API_TOKEN", name: "AUTH_TOKEN"
     parameter :page, "Current page of orders", with_example: true
 
     let(:page) { 1 }
 
     before do
       2.times do |i|
-        Order.create(:name => "Order #{i}", :email => "email#{i}@example.com", :paid => true)
+        Order.create(name: "Order #{i}", email: "email#{i}@example.com", paid: true)
       end
     end
 
@@ -27,7 +27,7 @@
   end
 
   head "/orders" do
-    authentication :apiKey, "API_TOKEN", :name => "AUTH_TOKEN"
+    authentication :apiKey, "API_TOKEN", name: "AUTH_TOKEN"
 
     example_request "Getting the headers" do
       expect(response_headers["Cache-Control"]).to eq("max-age=0, private, must-revalidate")
@@ -35,17 +35,17 @@
   end
 
   post "/orders" do
-    with_options :scope => :order, :with_example => true do
-      parameter :name, "Name of order", :required => true
-      parameter :paid, "If the order has been paid for", :required => true
+    with_options scope: :order, with_example: true do
+      parameter :name, "Name of order", required: true
+      parameter :paid, "If the order has been paid for", required: true
       parameter :email, "Email of user that placed the order"
-      parameter :data, "Array of string", :type => :array, :items => {:type => :string}
+      parameter :data, "Array of string", type: :array, items: {type: :string}
     end
 
-    with_options :scope => :order do
-      response_field :name, "Name of order", :type => :string
-      response_field :paid, "If the order has been paid for", :type => :boolean
-      response_field :email, "Email of user that placed the order", :type => :string
+    with_options scope: :order do
+      response_field :name, "Name of order", type: :string
+      response_field :paid, "If the order has been paid for", type: :boolean
+      response_field :email, "Email of user that placed the order", type: :string
     end
 
     let(:name) { "Order 1" }
@@ -92,7 +92,7 @@
   end
 
   put "/orders/:id" do
-    with_options :scope => :order, with_example: true do
+    with_options scope: :order, with_example: true do
       parameter :name, "Name of order"
       parameter :paid, "If the order has been paid for"
       parameter :email, "Email of user that placed the order"
diff --git a/example/spec/acceptance/uploads_spec.rb b/example/spec/acceptance/uploads_spec.rb
index b242ca54..258995c8 100644
--- a/example/spec/acceptance/uploads_spec.rb
+++ b/example/spec/acceptance/uploads_spec.rb
@@ -1,7 +1,7 @@
 require 'acceptance_helper'
 
 resource "Uploads" do
-  authentication :basic, :api_key, :description => "Api Key description"
+  authentication :basic, :api_key, description: "Api Key description"
 
   let(:api_key) { "Basic #{Base64.encode64('user:password')}" }
 
diff --git a/example/spec/acceptance_helper.rb b/example/spec/acceptance_helper.rb
index 7b4e69f4..f61cabea 100644
--- a/example/spec/acceptance_helper.rb
+++ b/example/spec/acceptance_helper.rb
@@ -3,7 +3,7 @@
 require 'rspec_api_documentation/dsl'
 
 RspecApiDocumentation.configure do |config|
-  config.format = [:open_api, :html]
+  config.format = [:open_api, :html, :json]
   config.curl_host = 'http://localhost:3000'
   config.api_name = "Example App API"
   config.api_explanation = "API Example Description"
diff --git a/example/spec/rails_helper.rb b/example/spec/rails_helper.rb
index b98cb0f7..388c4f3e 100644
--- a/example/spec/rails_helper.rb
+++ b/example/spec/rails_helper.rb
@@ -33,7 +33,7 @@
   # You can disable this behaviour by removing the line below, and instead
   # explicitly tag your specs with their type, e.g.:
   #
-  #     RSpec.describe UsersController, :type => :controller do
+  #     RSpec.describe UsersController, type: :controller do
   #       # ...
   #     end
   #