diff --git a/.travis.yml b/.travis.yml
index b40d57f..9d93db0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,21 @@
-rvm: 2.1.3
+rvm: 2.2.10
 
 sudo: required
+addons:
+  - chrome: stable
+
+env:
+  global:
+    DISPLAY: ":99.0"
+
+before_install:
+  - google-chrome-stable --version
+  - wget http://chromedriver.storage.googleapis.com/2.35/chromedriver_linux64.zip
+  - unzip chromedriver_linux64.zip
+  - sudo mv chromedriver /usr/local/bin/chromedriver
 
 install:
   - bundle -v
   - gem i bundler
-  - sudo sh -c 'curl -L https://toolbelt.treasuredata.com/sh/install-ubuntu-precise-td-agent2.sh | sh'
+  - sudo sh -c 'curl -L https://toolbelt.treasuredata.com/sh/install-ubuntu-trusty-td-agent2.sh | sh'
   - bundle install --jobs=4 --retry=4
diff --git a/Gemfile b/Gemfile
index c64d093..1c060a1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,17 +12,17 @@ group :development, :test do
 end
 
 group :development do
-  gem 'i18n_generators', '1.2.1'
+  gem 'i18n_generators', '2.1.1'
   gem 'better_errors'
-  gem 'web-console', '~> 2.0'
+  gem 'web-console', '~> 3.6'
 end
 
 group :test do
-  gem "factory_girl_rails"
-  gem "capybara", "~> 2.4.0"
+  gem "factory_bot_rails"
+  gem "capybara", "~> 3.0.2"
   gem "capybara-screenshot"
   gem "simplecov", "~> 0.16.1", require: false
-  gem "webmock", "~> 1.18.0"
+  gem "webmock", "~> 3.3.0"
   gem "timecop"
-  gem "poltergeist"
+  gem "selenium-webdriver", "~> 3.11"
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index b93c4c8..1ee5b7e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -5,7 +5,7 @@ PATH
       addressable
       bundler
       diff-lcs
-      draper (~> 2.1)
+      draper (~> 3.0)
       fluentd (>= 0.10.56, < 0.14)
       font-awesome-rails
       haml-rails (~> 1.0)
@@ -15,109 +15,104 @@ PATH
       kramdown (> 1.0.0)
       kramdown-haml
       puma
-      rails (~> 4.2.0)
+      rails (~> 5.2.0)
       rubyzip (~> 1.1)
-      sass-rails (~> 4.0.3)
+      sass-rails (~> 5.0.7)
       settingslogic
-      sucker_punch (~> 1.6.0)
+      sucker_punch (~> 2.0.4)
       thor
 
 GEM
   remote: https://rubygems.org/
   specs:
-    actionmailer (4.2.10)
-      actionpack (= 4.2.10)
-      actionview (= 4.2.10)
-      activejob (= 4.2.10)
+    actioncable (5.2.0)
+      actionpack (= 5.2.0)
+      nio4r (~> 2.0)
+      websocket-driver (>= 0.6.1)
+    actionmailer (5.2.0)
+      actionpack (= 5.2.0)
+      actionview (= 5.2.0)
+      activejob (= 5.2.0)
       mail (~> 2.5, >= 2.5.4)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-    actionpack (4.2.10)
-      actionview (= 4.2.10)
-      activesupport (= 4.2.10)
-      rack (~> 1.6)
-      rack-test (~> 0.6.2)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
+      rails-dom-testing (~> 2.0)
+    actionpack (5.2.0)
+      actionview (= 5.2.0)
+      activesupport (= 5.2.0)
+      rack (~> 2.0)
+      rack-test (>= 0.6.3)
+      rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (4.2.10)
-      activesupport (= 4.2.10)
+    actionview (5.2.0)
+      activesupport (= 5.2.0)
       builder (~> 3.1)
-      erubis (~> 2.7.0)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
+      erubi (~> 1.4)
+      rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activejob (4.2.10)
-      activesupport (= 4.2.10)
-      globalid (>= 0.3.0)
-    activemodel (4.2.10)
-      activesupport (= 4.2.10)
+    activejob (5.2.0)
+      activesupport (= 5.2.0)
+      globalid (>= 0.3.6)
+    activemodel (5.2.0)
+      activesupport (= 5.2.0)
+    activemodel-serializers-xml (1.0.2)
+      activemodel (> 5.x)
+      activesupport (> 5.x)
       builder (~> 3.1)
-    activerecord (4.2.10)
-      activemodel (= 4.2.10)
-      activesupport (= 4.2.10)
-      arel (~> 6.0)
-    activesupport (4.2.10)
-      i18n (~> 0.7)
+    activerecord (5.2.0)
+      activemodel (= 5.2.0)
+      activesupport (= 5.2.0)
+      arel (>= 9.0)
+    activestorage (5.2.0)
+      actionpack (= 5.2.0)
+      activerecord (= 5.2.0)
+      marcel (~> 0.3.1)
+    activesupport (5.2.0)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 0.7, < 2)
       minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.5.1)
-      public_suffix (~> 2.0, >= 2.0.2)
-    arel (6.0.4)
+    addressable (2.5.2)
+      public_suffix (>= 2.0.2, < 4.0)
+    arel (9.0.0)
     better_errors (2.1.1)
       coderay (>= 1.0.0)
       erubis (>= 2.6.6)
       rack (>= 0.9.0)
-    binding_of_caller (0.7.2)
-      debug_inspector (>= 0.0.1)
+    bindex (0.5.0)
     builder (3.2.3)
-    capybara (2.4.4)
-      mime-types (>= 1.16)
-      nokogiri (>= 1.3.3)
-      rack (>= 1.0.0)
-      rack-test (>= 0.5.4)
-      xpath (~> 2.0)
-    capybara-screenshot (1.0.14)
-      capybara (>= 1.0, < 3)
+    capybara (3.0.2)
+      addressable
+      mini_mime (>= 0.1.3)
+      nokogiri (~> 1.8)
+      rack (>= 1.6.0)
+      rack-test (>= 0.6.3)
+      xpath (~> 3.0)
+    capybara-screenshot (1.0.19)
+      capybara (>= 1.0, < 4)
       launchy
-    celluloid (0.17.3)
-      celluloid-essentials
-      celluloid-extras
-      celluloid-fsm
-      celluloid-pool
-      celluloid-supervision
-      timers (>= 4.1.1)
-    celluloid-essentials (0.20.5)
-      timers (>= 4.1.1)
-    celluloid-extras (0.20.5)
-      timers (>= 4.1.1)
-    celluloid-fsm (0.20.5)
-      timers (>= 4.1.1)
-    celluloid-pool (0.20.5)
-      timers (>= 4.1.1)
-    celluloid-supervision (0.20.6)
-      timers (>= 4.1.1)
-    cliver (0.3.2)
+    childprocess (0.9.0)
+      ffi (~> 1.0, >= 1.0.11)
     coderay (1.1.1)
     concurrent-ruby (1.0.5)
     cool.io (1.5.3)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
     crass (1.0.4)
-    debug_inspector (0.0.2)
     diff-lcs (1.3)
     docile (1.3.0)
-    domain_name (0.5.20170404)
-      unf (>= 0.0.5, < 1.0.0)
-    draper (2.1.0)
-      actionpack (>= 3.0)
-      activemodel (>= 3.0)
-      activesupport (>= 3.0)
+    draper (3.0.1)
+      actionpack (~> 5.0)
+      activemodel (~> 5.0)
+      activemodel-serializers-xml (~> 1.0)
+      activesupport (~> 5.0)
       request_store (~> 1.0)
+    erubi (1.7.1)
     erubis (2.7.0)
-    factory_girl (4.8.0)
+    factory_bot (4.8.2)
       activesupport (>= 3.0.0)
-    factory_girl_rails (4.8.0)
-      factory_girl (~> 4.8.0)
+    factory_bot_rails (4.8.2)
+      factory_bot (~> 4.8.2)
       railties (>= 3.0.0)
+    ffi (1.9.23)
     fluentd (0.12.43)
       cool.io (>= 1.2.2, < 2.0.0)
       http_parser.rb (>= 0.5.1, < 0.7.0)
@@ -141,26 +136,22 @@ GEM
       haml (>= 4.0.6, < 6.0)
       html2haml (>= 1.0.1)
       railties (>= 4.0.1)
-    hike (1.2.3)
-    hitimes (1.2.6)
+    hashdiff (0.3.7)
     html2haml (2.2.0)
       erubis (~> 2.7.0)
       haml (>= 4.0, < 6)
       nokogiri (>= 1.6.0)
       ruby_parser (~> 3.5)
-    http-cookie (1.0.3)
-      domain_name (~> 0.5)
     http_parser.rb (0.6.0)
     httpclient (2.8.3)
-    i18n (0.9.5)
+    i18n (1.0.1)
       concurrent-ruby (~> 1.0)
-    i18n_generators (1.2.1)
-      mechanize
+    i18n_generators (2.1.1)
       rails (>= 3.0.0)
     jbuilder (2.7.0)
       activesupport (>= 4.2.0)
       multi_json (>= 1.2)
-    jquery-rails (4.3.1)
+    jquery-rails (4.3.3)
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
@@ -175,69 +166,57 @@ GEM
       nokogiri (>= 1.5.9)
     mail (2.7.0)
       mini_mime (>= 0.1.1)
-    mechanize (2.7.5)
-      domain_name (~> 0.5, >= 0.5.1)
-      http-cookie (~> 1.0)
-      mime-types (>= 1.17.2)
-      net-http-digest_auth (~> 1.1, >= 1.1.1)
-      net-http-persistent (~> 2.5, >= 2.5.2)
-      nokogiri (~> 1.6)
-      ntlm-http (~> 0.1, >= 0.1.1)
-      webrobots (>= 0.0.9, < 0.2)
+    marcel (0.3.2)
+      mimemagic (~> 0.3.2)
     method_source (0.8.2)
-    mime-types (3.1)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2016.0521)
+    mimemagic (0.3.2)
     mini_mime (1.0.0)
     mini_portile2 (2.3.0)
     minitest (5.11.3)
     msgpack (1.2.4)
     multi_json (1.13.1)
-    net-http-digest_auth (1.4.1)
-    net-http-persistent (2.9.4)
+    nio4r (2.3.0)
     nokogiri (1.8.2)
       mini_portile2 (~> 2.3.0)
-    ntlm-http (0.1.1)
-    poltergeist (1.14.0)
-      capybara (~> 2.1)
-      cliver (~> 0.3.1)
-      websocket-driver (>= 0.2.0)
     pry (0.10.4)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
     pry-rails (0.3.6)
       pry (>= 0.10.4)
-    public_suffix (2.0.5)
+    public_suffix (3.0.2)
     puma (3.11.4)
-    rack (1.6.9)
-    rack-test (0.6.3)
-      rack (>= 1.0)
-    rails (4.2.10)
-      actionmailer (= 4.2.10)
-      actionpack (= 4.2.10)
-      actionview (= 4.2.10)
-      activejob (= 4.2.10)
-      activemodel (= 4.2.10)
-      activerecord (= 4.2.10)
-      activesupport (= 4.2.10)
-      bundler (>= 1.3.0, < 2.0)
-      railties (= 4.2.10)
-      sprockets-rails
-    rails-deprecated_sanitizer (1.0.3)
-      activesupport (>= 4.2.0.alpha)
-    rails-dom-testing (1.0.9)
-      activesupport (>= 4.2.0, < 5.0)
-      nokogiri (~> 1.6)
-      rails-deprecated_sanitizer (>= 1.0.1)
+    rack (2.0.4)
+    rack-test (1.0.0)
+      rack (>= 1.0, < 3)
+    rails (5.2.0)
+      actioncable (= 5.2.0)
+      actionmailer (= 5.2.0)
+      actionpack (= 5.2.0)
+      actionview (= 5.2.0)
+      activejob (= 5.2.0)
+      activemodel (= 5.2.0)
+      activerecord (= 5.2.0)
+      activestorage (= 5.2.0)
+      activesupport (= 5.2.0)
+      bundler (>= 1.3.0)
+      railties (= 5.2.0)
+      sprockets-rails (>= 2.0.0)
+    rails-dom-testing (2.0.3)
+      activesupport (>= 4.2.0)
+      nokogiri (>= 1.6)
     rails-html-sanitizer (1.0.4)
       loofah (~> 2.2, >= 2.2.2)
-    railties (4.2.10)
-      actionpack (= 4.2.10)
-      activesupport (= 4.2.10)
+    railties (5.2.0)
+      actionpack (= 5.2.0)
+      activesupport (= 5.2.0)
+      method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rake (12.3.1)
+    rb-fsevent (0.10.3)
+    rb-inotify (0.9.10)
+      ffi (>= 0.5.0, < 2)
     request_store (1.4.1)
       rack (>= 1.4)
     rspec-core (3.5.4)
@@ -261,12 +240,20 @@ GEM
       sexp_processor (~> 4.9)
     rubyzip (1.2.1)
     safe_yaml (1.0.4)
-    sass (3.2.19)
-    sass-rails (4.0.5)
-      railties (>= 4.0.0, < 5.0)
-      sass (~> 3.2.2)
-      sprockets (~> 2.8, < 3.0)
-      sprockets-rails (~> 2.0)
+    sass (3.5.6)
+      sass-listen (~> 4.0.0)
+    sass-listen (4.0.0)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
+    sass-rails (5.0.7)
+      railties (>= 4.0.0, < 6)
+      sass (~> 3.1)
+      sprockets (>= 2.8, < 4.0)
+      sprockets-rails (>= 2.0, < 4.0)
+      tilt (>= 1.1, < 3)
+    selenium-webdriver (3.11.0)
+      childprocess (~> 0.5)
+      rubyzip (~> 1.2)
     settingslogic (2.0.9)
     sexp_processor (4.11.0)
     sigdump (0.2.4)
@@ -276,46 +263,39 @@ GEM
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
     slop (3.6.0)
-    sprockets (2.12.4)
-      hike (~> 1.2)
-      multi_json (~> 1.0)
-      rack (~> 1.0)
-      tilt (~> 1.1, != 1.3.0)
-    sprockets-rails (2.3.3)
-      actionpack (>= 3.0)
-      activesupport (>= 3.0)
-      sprockets (>= 2.8, < 4.0)
+    sprockets (3.7.1)
+      concurrent-ruby (~> 1.0)
+      rack (> 1, < 3)
+    sprockets-rails (3.2.1)
+      actionpack (>= 4.0)
+      activesupport (>= 4.0)
+      sprockets (>= 3.0.0)
     string-scrub (0.0.5)
-    sucker_punch (1.6.0)
-      celluloid (~> 0.17.2)
+    sucker_punch (2.0.4)
+      concurrent-ruby (~> 1.0.0)
     temple (0.8.0)
     thor (0.20.0)
     thread_safe (0.3.6)
-    tilt (1.4.1)
+    tilt (2.0.8)
     timecop (0.8.1)
-    timers (4.1.2)
-      hitimes
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
     tzinfo-data (1.2018.4)
       tzinfo (>= 1.0.0)
-    unf (0.1.4)
-      unf_ext
-    unf_ext (0.0.7.4)
-    web-console (2.3.0)
-      activemodel (>= 4.0)
-      binding_of_caller (>= 0.7.2)
-      railties (>= 4.0)
-      sprockets-rails (>= 2.0, < 4.0)
-    webmock (1.18.0)
+    web-console (3.6.0)
+      actionview (>= 5.0)
+      activemodel (>= 5.0)
+      bindex (>= 0.4.0)
+      railties (>= 5.0)
+    webmock (3.3.0)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
-    webrobots (0.1.2)
-    websocket-driver (0.6.5)
+      hashdiff
+    websocket-driver (0.7.0)
       websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.2)
-    xpath (2.0.0)
-      nokogiri (~> 1.3)
+    websocket-extensions (0.1.3)
+    xpath (3.0.0)
+      nokogiri (~> 1.8)
     yajl-ruby (1.3.1)
 
 PLATFORMS
@@ -323,20 +303,20 @@ PLATFORMS
 
 DEPENDENCIES
   better_errors
-  capybara (~> 2.4.0)
+  capybara (~> 3.0.2)
   capybara-screenshot
-  factory_girl_rails
+  factory_bot_rails
   fluentd-ui!
-  i18n_generators (= 1.2.1)
-  poltergeist
+  i18n_generators (= 2.1.1)
   pry
   pry-rails
   rake
   rspec-rails (~> 3.0)
+  selenium-webdriver (~> 3.11)
   simplecov (~> 0.16.1)
   timecop
-  web-console (~> 2.0)
-  webmock (~> 1.18.0)
+  web-console (~> 3.6)
+  webmock (~> 3.3.0)
 
 BUNDLED WITH
    1.16.1
diff --git a/app/controllers/concerns/setting_history_concern.rb b/app/controllers/concerns/setting_history_concern.rb
index 12accf3..72c43af 100644
--- a/app/controllers/concerns/setting_history_concern.rb
+++ b/app/controllers/concerns/setting_history_concern.rb
@@ -28,7 +28,7 @@ module SettingHistoryConcern
     else
       flash = { danger: @fluentd.agent.log.tail(1).first }
     end
-    redirect_to :back, flash: flash
+    redirect_back fallback_location: root_url, flash: flash
   end
 
 end
diff --git a/app/controllers/misc_controller.rb b/app/controllers/misc_controller.rb
index 630592c..2e3b240 100644
--- a/app/controllers/misc_controller.rb
+++ b/app/controllers/misc_controller.rb
@@ -19,7 +19,7 @@ class MiscController < ApplicationController
   end
 
   def upgrading_status
-    if FluentdUiRestart::LOCK.present?
+    if FluentdUiRestartJob::LOCK.present?
       return render text: "updating"
     end
 
@@ -73,6 +73,6 @@ class MiscController < ApplicationController
   end
 
   def update!
-    FluentdUiRestart.new.async.perform
+    FluentdUiRestart.perform_later
   end
 end
diff --git a/app/controllers/plugins_controller.rb b/app/controllers/plugins_controller.rb
index 3ceb196..f770716 100644
--- a/app/controllers/plugins_controller.rb
+++ b/app/controllers/plugins_controller.rb
@@ -17,27 +17,27 @@ class PluginsController < ApplicationController
 
   def install
     params[:plugins].each do |gem_name|
-      GemInstaller.new.async.perform(gem_name)
+      GemInstallerJob.perform_later(gem_name)
     end
     redirect_to plugins_path
   end
 
   def uninstall
     params[:plugins].each do |gem_name|
-      GemUninstaller.new.async.perform(gem_name)
+      GemUninstallerJob.perform_later(gem_name)
     end
     redirect_to plugins_path
   end
 
   def upgrade
-    GemInstaller.new.async.perform(params[:plugins][:name], params[:plugins][:version])
+    GemInstallerJob.perform_later(params[:plugins][:name], params[:plugins][:version])
     redirect_to plugins_path
   end
 
   def bulk_upgrade
     params[:plugins].each do |gem_name|
       pl = Plugin.new(gem_name: gem_name)
-      GemInstaller.new.async.perform(gem_name, pl.latest_version)
+      GemInstallerJob.perform_later(gem_name, pl.latest_version)
     end
     redirect_to plugins_path
   end
diff --git a/app/jobs/all_plugin_check_update_job.rb b/app/jobs/all_plugin_check_update_job.rb
new file mode 100644
index 0000000..d37ba1a
--- /dev/null
+++ b/app/jobs/all_plugin_check_update_job.rb
@@ -0,0 +1,10 @@
+class AllPluginCheckUpdateJob < ApplicationJob
+  queue_as :default
+
+  def perform(*args)
+    Plugin.installed.each do |pl|
+      GemUpdateCheckJob.perform_later(pl.gem_name)
+    end
+    AllPluginCheckUpdateJob.set(wait: 1.hour).perform_later # will be checked every hour
+  end
+end
diff --git a/app/jobs/application_job.rb b/app/jobs/application_job.rb
new file mode 100644
index 0000000..a009ace
--- /dev/null
+++ b/app/jobs/application_job.rb
@@ -0,0 +1,2 @@
+class ApplicationJob < ActiveJob::Base
+end
diff --git a/app/workers/fluentd_ui_restart.rb b/app/jobs/fluentd_ui_restart_job.rb
similarity index 81%
rename from app/workers/fluentd_ui_restart.rb
rename to app/jobs/fluentd_ui_restart_job.rb
index 5b40744..f49b45b 100644
--- a/app/workers/fluentd_ui_restart.rb
+++ b/app/jobs/fluentd_ui_restart_job.rb
@@ -1,5 +1,5 @@
-class FluentdUiRestart
-  include SuckerPunch::Job
+class FluentdUiRestartJob < ApplicationJob
+  queue_as :default
 
   LOCK = []
 
@@ -20,7 +20,7 @@ class FluentdUiRestart
     lock!
 
     # NOTE: install will be failed before released fluentd-ui gem
-    SuckerPunch.logger.info "[restart] install new fluentd-ui"
+    logger.info "[restart] install new fluentd-ui"
     Plugin.new(gem_name: "fluentd-ui").install!
 
     if Rails.env.production?
@@ -29,7 +29,7 @@ class FluentdUiRestart
       cmd = %W(bundle exec rails s)
     end
 
-    SuckerPunch.logger.info "[restart] will restart"
+    logger.info "[restart] will restart"
     Bundler.with_clean_env do
       restarter = "#{Rails.root}/bin/fluentd-ui-restart"
       Process.spawn(*[restarter, $$.to_s, *cmd, *ARGV]) && Process.kill(:TERM, $$)
diff --git a/app/jobs/fluentd_ui_update_check_job.rb b/app/jobs/fluentd_ui_update_check_job.rb
new file mode 100644
index 0000000..3aaffeb
--- /dev/null
+++ b/app/jobs/fluentd_ui_update_check_job.rb
@@ -0,0 +1,11 @@
+class FluentdUiUpdateCheckJob < ApplicationJob
+  queue_as :default
+
+  def perform
+    pl = Plugin.new(gem_name: "fluentd-ui")
+    if pl.gem_versions
+      FluentdUI.latest_version = pl.latest_version
+    end
+    FluentdUiUpdateCheckJob.set(wait: 1.hour).perform_later # will be checked every hour
+  end
+end
diff --git a/app/workers/gem_installer.rb b/app/jobs/gem_installer_job.rb
similarity index 64%
rename from app/workers/gem_installer.rb
rename to app/jobs/gem_installer_job.rb
index 071d64b..9be59b7 100644
--- a/app/workers/gem_installer.rb
+++ b/app/jobs/gem_installer_job.rb
@@ -1,6 +1,5 @@
-class GemInstaller
-  include SuckerPunch::Job
-  workers 16
+class GemInstallerJob < ApplicationJob
+  queue_as :default
 
   def perform(gem_name, version = nil)
     SuckerPunch.logger.info "install #{gem_name} #{version}"
@@ -9,9 +8,9 @@ class GemInstaller
       # NOTE: uninstall all versions of `gem_name` then install it for upgrade/downgrade
       pl.uninstall! if pl.installed?
       pl.install!
-      SuckerPunch.logger.info "installed #{gem_name} #{version}"
+      logger.info "installed #{gem_name} #{version}"
     rescue Plugin::GemError
-      SuckerPunch.logger.warn "installing #{gem_name} #{version} is failed"
+      logger.warn "installing #{gem_name} #{version} is failed"
     end
   end
 end
diff --git a/app/jobs/gem_uninstaller_job.rb b/app/jobs/gem_uninstaller_job.rb
new file mode 100644
index 0000000..dc78cc4
--- /dev/null
+++ b/app/jobs/gem_uninstaller_job.rb
@@ -0,0 +1,14 @@
+class GemUninstallerJob < ApplicationJob
+  queue_as :default
+
+  def perform(gem_name)
+    logger.info "uninstall #{gem_name}"
+    pl = Plugin.new(gem_name: gem_name)
+    begin
+      pl.uninstall!
+      logger.info "uninstalled #{gem_name}"
+    rescue Plugin::GemError
+      logger.warn "uninstalling #{gem_name} is failed"
+    end
+  end
+end
diff --git a/app/jobs/gem_update_check_job.rb b/app/jobs/gem_update_check_job.rb
new file mode 100644
index 0000000..16cd53b
--- /dev/null
+++ b/app/jobs/gem_update_check_job.rb
@@ -0,0 +1,9 @@
+class GemUpdateCheckJob < ApplicationJob
+  queue_as :default
+
+  def perform(gem_name)
+    logger.info "check #{gem_name} latest version"
+    pl = Plugin.new(gem_name: gem_name)
+    pl.gem_versions!
+  end
+end
diff --git a/app/workers/all_plugin_check_update.rb b/app/workers/all_plugin_check_update.rb
deleted file mode 100644
index f67a35b..0000000
--- a/app/workers/all_plugin_check_update.rb
+++ /dev/null
@@ -1,14 +0,0 @@
-class AllPluginCheckUpdate
-  include SuckerPunch::Job
-
-  def perform
-    Plugin.installed.each do |pl|
-      GemUpdateCheck.new.async.perform(pl.gem_name)
-    end
-    later(3600) # will be checked every hour
-  end
-
-  def later(sec)
-    after(sec) { perform }
-  end
-end
diff --git a/app/workers/fluentd_ui_update_check.rb b/app/workers/fluentd_ui_update_check.rb
deleted file mode 100644
index cf916f0..0000000
--- a/app/workers/fluentd_ui_update_check.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-class FluentdUiUpdateCheck
-  include SuckerPunch::Job
-
-  def perform
-    pl = Plugin.new(gem_name: "fluentd-ui")
-    if pl.gem_versions
-      FluentdUI.latest_version = pl.latest_version
-    end
-    later(3600) # will be checked every hour
-  end
-
-  def later(sec)
-    after(sec) { perform }
-  end
-end
diff --git a/app/workers/gem_uninstaller.rb b/app/workers/gem_uninstaller.rb
deleted file mode 100644
index 04eac9f..0000000
--- a/app/workers/gem_uninstaller.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-class GemUninstaller
-  include SuckerPunch::Job
-  workers 16
-
-  def perform(gem_name)
-    SuckerPunch.logger.info "uninstall #{gem_name}"
-    pl = Plugin.new(gem_name: gem_name)
-    begin
-      pl.uninstall!
-      SuckerPunch.logger.info "uninstalled #{gem_name}"
-    rescue Plugin::GemError
-      SuckerPunch.logger.warn "uninstalling #{gem_name} is failed"
-    end
-  end
-end
diff --git a/app/workers/gem_update_check.rb b/app/workers/gem_update_check.rb
deleted file mode 100644
index e533ce9..0000000
--- a/app/workers/gem_update_check.rb
+++ /dev/null
@@ -1,10 +0,0 @@
-class GemUpdateCheck
-  include SuckerPunch::Job
-  workers 16
-
-  def perform(gem_name)
-    SuckerPunch.logger.info "check #{gem_name} latest version"
-    pl = Plugin.new(gem_name: gem_name)
-    pl.gem_versions!
-  end
-end
diff --git a/config/application.rb b/config/application.rb
index 56bed7b..aa8df9b 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -35,7 +35,10 @@ module FluentdUi
     # 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 = 'en'
-    config.autoload_paths += %W(#{config.root}/app/workers #{config.root}/lib)
+    config.i18n.available_locales = %i(en ja)
+    config.autoload_paths += %W(#{config.root}/lib)
+
+    config.active_job.queue_adapter = :sucker_punch
 
     # NOTE: currently, fluentd-ui does not using ActiveRecord, and using Time.now instead of Time.zone.now for each different TZ for users.
     #       If AR will be used, please comment in and check timezone.
diff --git a/config/environments/test.rb b/config/environments/test.rb
index 10db31f..db7d559 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -13,8 +13,8 @@ Rails.application.configure do
   config.eager_load = false
 
   # Configure static file server for tests with Cache-Control for performance.
-  config.serve_static_files   = true
-  config.static_cache_control = 'public, max-age=3600'
+  config.public_file_server.enabled = true
+  config.public_file_server_headers = { 'Cache-Control' => 'public, max-age=3600' }
 
   # Show full error reports and disable caching.
   config.consider_all_requests_local       = true
diff --git a/config/initializers/fluentd_ui_update_check.rb b/config/initializers/fluentd_ui_update_check.rb
index 820a475..b045033 100644
--- a/config/initializers/fluentd_ui_update_check.rb
+++ b/config/initializers/fluentd_ui_update_check.rb
@@ -1,6 +1,7 @@
+require "plugin" # Avoid: RuntimeError Circular dependency detected while autoloading constant Plugin
 unless Rails.env.test?
   unless FluentdUI.td_agent_ui?
     # td-agent-ui shouldn't auto update
-    FluentdUiUpdateCheck.new.async.perform
+    FluentdUiUpdateCheckJob.perform_later
   end
 end
diff --git a/config/initializers/prefetch_gem_updates.rb b/config/initializers/prefetch_gem_updates.rb
index 60d2370..d6850f6 100644
--- a/config/initializers/prefetch_gem_updates.rb
+++ b/config/initializers/prefetch_gem_updates.rb
@@ -1 +1,2 @@
-AllPluginCheckUpdate.new.async.perform
+require "plugin" # Avoid: RuntimeError Circular dependency detected while autoloading constant Plugin
+AllPluginCheckUpdateJob.perform_later
diff --git a/config/locales/ja.yml b/config/locales/ja.yml
index f86780d..a6ebaf8 100644
--- a/config/locales/ja.yml
+++ b/config/locales/ja.yml
@@ -1,3 +1,4 @@
+---
 ja:
   date:
     abbr_day_names:
@@ -31,9 +32,9 @@ ja:
     - 金曜日
     - 土曜日
     formats:
-      default: ! '%Y/%m/%d'
-      long: ! '%Y年%m月%d日(%a)'
-      short: ! '%m/%d'
+      default: "%Y/%m/%d"
+      long: "%Y年%m月%d日(%a)"
+      short: "%m/%d"
     month_names:
     -
     - 1月
@@ -65,29 +66,32 @@ ja:
         other: 約%{count}年
       almost_x_years:
         one: 1年弱
-        other: ! '%{count}年弱'
+        other: "%{count}年弱"
       half_a_minute: 30秒前後
       less_than_x_minutes:
         one: 1分以内
-        other: ! '%{count}分未満'
+        other: "%{count}分未満"
       less_than_x_seconds:
         one: 1秒以内
-        other: ! '%{count}秒未満'
+        other: "%{count}秒未満"
       over_x_years:
         one: 1年以上
-        other: ! '%{count}年以上'
+        other: "%{count}年以上"
       x_days:
         one: 1日
-        other: ! '%{count}日'
+        other: "%{count}日"
       x_minutes:
         one: 1分
-        other: ! '%{count}分'
+        other: "%{count}分"
       x_months:
         one: 1ヶ月
-        other: ! '%{count}ヶ月'
+        other: "%{count}ヶ月"
+      x_years:
+        one: 1年
+        other: "%{count}年"
       x_seconds:
         one: 1秒
-        other: ! '%{count}秒'
+        other: "%{count}秒"
     prompts:
       day: 日
       hour: 時
@@ -96,40 +100,40 @@ ja:
       second: 秒
       year: 年
   errors:
-    format: ! '%{attribute}%{message}'
+    format: "%{attribute}%{message}"
     messages:
-      accepted: を受諾してください。
-      blank: を入力してください。
-      present: は入力しないでください。
-      confirmation: と%{attribute}の入力が一致しません。
-      empty: を入力してください。
-      equal_to: は%{count}にしてください。
-      even: は偶数にしてください。
-      exclusion: は予約されています。
-      greater_than: は%{count}より大きい値にしてください。
-      greater_than_or_equal_to: は%{count}以上の値にしてください。
-      inclusion: は一覧にありません。
-      invalid: は不正な値です。
-      less_than: は%{count}より小さい値にしてください。
-      less_than_or_equal_to: は%{count}以下の値にしてください。
-      not_a_number: は数値で入力してください。
-      not_an_integer: は整数で入力してください。
-      odd: は奇数にしてください。
-      record_invalid: バリデーションに失敗しました。 %{errors}
-      restrict_dependent_destroy: ! '%{record}が存在しているので削除できません。'
-      taken: はすでに存在します。
-      too_long: は%{count}文字以内で入力してください。
-      too_short: は%{count}文字以上で入力してください。
-      wrong_length: は%{count}文字で入力してください。
-      other_than: "は%{count}以外の値にしてください。"
+      accepted: を受諾してください
+      blank: を入力してください
+      present: は入力しないでください
+      confirmation: と%{attribute}の入力が一致しません
+      empty: を入力してください
+      equal_to: は%{count}にしてください
+      even: は偶数にしてください
+      exclusion: は予約されています
+      greater_than: は%{count}より大きい値にしてください
+      greater_than_or_equal_to: は%{count}以上の値にしてください
+      inclusion: は一覧にありません
+      invalid: は不正な値です
+      less_than: は%{count}より小さい値にしてください
+      less_than_or_equal_to: は%{count}以下の値にしてください
+      model_invalid: "バリデーションに失敗しました: %{errors}"
+      not_a_number: は数値で入力してください
+      not_an_integer: は整数で入力してください
+      odd: は奇数にしてください
+      required: を入力してください
+      taken: はすでに存在します
+      too_long: は%{count}文字以内で入力してください
+      too_short: は%{count}文字以上で入力してください
+      wrong_length: は%{count}文字で入力してください
+      other_than: は%{count}以外の値にしてください
     template:
-      body: 次の項目を確認してください。
+      body: 次の項目を確認してください
       header:
-        one: ! '%{model}にエラーが発生しました。'
-        other: ! '%{model}に%{count}個のエラーが発生しました。'
+        one: "%{model}にエラーが発生しました"
+        other: "%{model}に%{count}個のエラーが発生しました"
   helpers:
     select:
-      prompt: 選択してください。
+      prompt: 選択してください
     submit:
       create: 登録する
       submit: 保存する
@@ -137,22 +141,22 @@ ja:
   number:
     currency:
       format:
-        delimiter: ! ','
-        format: ! '%n%u'
+        delimiter: ","
+        format: "%n%u"
         precision: 0
-        separator: .
+        separator: "."
         significant: false
         strip_insignificant_zeros: false
         unit: 円
     format:
-      delimiter: ! ','
+      delimiter: ","
       precision: 3
-      separator: .
+      separator: "."
       significant: false
       strip_insignificant_zeros: false
     human:
       decimal_units:
-        format: ! '%n %u'
+        format: "%n %u"
         units:
           billion: 十億
           million: 百万
@@ -166,13 +170,13 @@ ja:
         significant: true
         strip_insignificant_zeros: true
       storage_units:
-        format: ! '%n%u'
+        format: "%n%u"
         units:
           byte: バイト
-          gb: ギガバイト
-          kb: キロバイト
-          mb: メガバイト
-          tb: テラバイト
+          gb: GB
+          kb: KB
+          mb: MB
+          tb: TB
     percentage:
       format:
         delimiter: ''
@@ -182,13 +186,13 @@ ja:
         delimiter: ''
   support:
     array:
-      last_word_connector: と
-      two_words_connector: と
-      words_connector: と
+      last_word_connector: 、
+      two_words_connector: 、
+      words_connector: 、
   time:
     am: 午前
     formats:
-      default: ! '%Y/%m/%d %H:%M:%S'
-      long: ! '%Y年%m月%d日(%a) %H時%M分%S秒 %z'
-      short: ! '%y/%m/%d %H:%M'
+      default: "%Y/%m/%d %H:%M:%S"
+      long: "%Y年%m月%d日(%a) %H時%M分%S秒 %z"
+      short: "%y/%m/%d %H:%M"
     pm: 午後
diff --git a/fluentd-ui.gemspec b/fluentd-ui.gemspec
index 1b7cf87..74e4344 100644
--- a/fluentd-ui.gemspec
+++ b/fluentd-ui.gemspec
@@ -25,15 +25,15 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_dependency "fluentd", [">= 0.10.56", "< 0.14"]
-  spec.add_dependency 'rails', '~> 4.2.0'
-  spec.add_dependency 'sucker_punch', "~> 1.6.0"
+  spec.add_dependency 'rails', '~> 5.2.0'
+  spec.add_dependency 'sucker_punch', "~> 2.0.4"
   spec.add_dependency 'addressable'
   spec.add_dependency "font-awesome-rails"
-  spec.add_dependency 'sass-rails', '~> 4.0.3'
+  spec.add_dependency 'sass-rails', '~> 5.0.7'
   spec.add_dependency "haml-rails", "~> 1.0"
   spec.add_dependency 'jquery-rails', "~> 4.3.1"
   spec.add_dependency 'jbuilder', '~> 2.0'
-  spec.add_dependency "draper", '~> 2.1'
+  spec.add_dependency "draper", '~> 3.0'
   spec.add_dependency "bundler"
   spec.add_dependency "httpclient", "~> 2.5" # same as td-agent
   spec.add_dependency "settingslogic"
diff --git a/spec/controllers/application_controller_spec.rb b/spec/controllers/application_controller_spec.rb
index 236ec8e..75a4daf 100644
--- a/spec/controllers/application_controller_spec.rb
+++ b/spec/controllers/application_controller_spec.rb
@@ -6,24 +6,20 @@ describe DummyController do
   controller DummyController do
     skip_before_action :login_required
     def index
-      render :text => "Hello World"
+      render plain: "Hello World"
     end
   end
 
   describe '#set_locale' do
     let!(:default_locale) { :en }
-    let!(:available_locales) { [:en, :ja] }
 
     before do
-      I18n.stub(:default_locale).and_return(default_locale)
-      I18n.stub(:available_locales).and_return(available_locales)
-
       I18n.locale = I18n.default_locale #initialize
     end
 
     context 'with params[:lang]' do
       before do
-        get 'index', lang: param_lang
+        get 'index', params: { lang: param_lang }
       end
 
       context 'and in available_locales' do
diff --git a/spec/factories/fluentd.rb b/spec/factories/fluentd.rb
index ceccc65..aff33b9 100644
--- a/spec/factories/fluentd.rb
+++ b/spec/factories/fluentd.rb
@@ -1,4 +1,4 @@
-FactoryGirl.define do
+FactoryBot.define do
   factory :fluentd do
     dir = Rails.root.join("tmp/fluentd-test").to_s
     FileUtils.mkdir_p(dir)
diff --git a/spec/factories/plugins.rb b/spec/factories/plugins.rb
index 94e9cb5..010699b 100644
--- a/spec/factories/plugins.rb
+++ b/spec/factories/plugins.rb
@@ -1,6 +1,6 @@
-# Read about factories at https://github.com/thoughtbot/factory_girl
+# Read about factories at https://github.com/thoughtbot/factory_bot
 
-FactoryGirl.define do
+FactoryBot.define do
   factory :plugin do
     gem_name "fluent-plugin-dummy"
     version "1.2.3"
diff --git a/spec/factories/user.rb b/spec/factories/user.rb
index d691850..e5f5e63 100644
--- a/spec/factories/user.rb
+++ b/spec/factories/user.rb
@@ -1,4 +1,4 @@
-FactoryGirl.define do
+FactoryBot.define do
   factory :user do
     name "admin"
     password "changeme"
diff --git a/spec/features/fluentd/setting/histories_spec.rb b/spec/features/fluentd/setting/histories_spec.rb
index e0965da..0c5e3f3 100644
--- a/spec/features/fluentd/setting/histories_spec.rb
+++ b/spec/features/fluentd/setting/histories_spec.rb
@@ -35,16 +35,17 @@ describe "histories", stub: :daemon do
 
     it 'show histories#show' do
       page.should have_css('h1', text: I18n.t('fluentd.settings.histories.show.page_title'))
-      page.should have_text(last_backup_file.content)
+
+      page.should has_text?(last_backup_file.content)
     end
 
     describe 'diff' do
       context 'has diff' do
         it 'shows diff between current and target' do
-          page.should have_text("-   type http")
-          page.should have_text("+   type forward")
-          page.should have_text("-   port 8899")
-          page.should have_text("+   port 24224")
+          page.should has_text?("-   type http")
+          page.should has_text?("+   type forward")
+          page.should has_text?("-   port 8899")
+          page.should has_text?("+   port 24224")
         end
       end
 
@@ -64,7 +65,7 @@ describe "histories", stub: :daemon do
 
       page.should have_css('h1', text: I18n.t('fluentd.settings.show.page_title'))
       page.should have_text(I18n.t('messages.config_successfully_copied', brand: 'fluentd') )
-      page.should have_text(last_backup_file.content)
+      page.should has_text?(last_backup_file.content)
     end
 
     describe "configtest" do
diff --git a/spec/features/fluentd/setting/running_backup_spec.rb b/spec/features/fluentd/setting/running_backup_spec.rb
index 52a3f23..8500fb7 100644
--- a/spec/features/fluentd/setting/running_backup_spec.rb
+++ b/spec/features/fluentd/setting/running_backup_spec.rb
@@ -39,9 +39,10 @@ describe "running_backup", stub: :daemon do
       describe 'diff' do
         context 'has diff' do
           it 'shows diff between current and running' do
-            expect(page).to have_text("-   type http")
-            expect(page).to have_text("-   port 8899")
-            expect(page).to have_text("+   Running backup file content")
+            diff = page.first(".diff pre").native.inner_text
+            expect(diff).to include("-   type http")
+            expect(diff).to include("-   port 8899")
+            expect(diff).to include("+ Running backup file content")
           end
         end
 
diff --git a/spec/features/setting_spec.rb b/spec/features/setting_spec.rb
index 129a7cc..682dc67 100644
--- a/spec/features/setting_spec.rb
+++ b/spec/features/setting_spec.rb
@@ -50,6 +50,7 @@ describe 'setting', stub: :daemon do
 
   describe "config" do
     before do
+      Fluentd::Agent::TdAgent.any_instance.stub(:dryrun).with(an_instance_of(String)).and_return(true)
       daemon.agent.config_write conf
       click_link I18n.t('terms.edit')
     end
diff --git a/spec/models/fluentd_spec.rb b/spec/models/fluentd_spec.rb
index 8581d2a..b23f238 100644
--- a/spec/models/fluentd_spec.rb
+++ b/spec/models/fluentd_spec.rb
@@ -21,19 +21,19 @@ describe Fluentd do
       context "not writable" do
         before { FileUtils.chmod(0400, path) }
         it { should_not be_blank }
-        it { subject.get(column).should include(I18n.t('activerecord.errors.messages.lack_write_permission')) }
+        it { subject[column].should include(I18n.t('activerecord.errors.messages.lack_write_permission')) }
       end
 
       context "not readable" do
         before { FileUtils.chmod(0200, path) }
         it { should_not be_blank }
-        it { subject.get(column).should include(I18n.t('activerecord.errors.messages.lack_read_permission')) }
+        it { subject[column].should include(I18n.t('activerecord.errors.messages.lack_read_permission')) }
       end
 
       context "is directory" do
         before { fluentd.send("#{column}=", Rails.root + "tmp") }
         it { should_not be_blank }
-        it { subject.get(column).should include(I18n.t('activerecord.errors.messages.is_a_directory')) }
+        it { subject[column].should include(I18n.t('activerecord.errors.messages.is_a_directory')) }
       end
     end
 
@@ -50,7 +50,7 @@ describe Fluentd do
       context "not writable" do
         before { FileUtils.chmod(0500, dir) }
         it { should_not be_blank }
-        it { subject.get(column).should include(I18n.t('activerecord.errors.messages.lack_write_permission')) }
+        it { subject[column].should include(I18n.t('activerecord.errors.messages.lack_write_permission')) }
       end
     end
   end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 7364240..fc2b2a7 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -9,8 +9,18 @@ require File.expand_path("../../config/environment", __FILE__)
 require 'rspec/rails'
 require 'webmock/rspec'
 WebMock.disable_net_connect!(allow_localhost: true)
-require 'capybara/poltergeist'
-Capybara.javascript_driver = :poltergeist
+require 'capybara/rspec'
+Capybara.register_driver :selenium do |app|
+  Capybara::Selenium::Driver.new(app,
+    browser: :chrome,
+    desired_capabilities: Selenium::WebDriver::Remote::Capabilities.chrome(
+      chrome_options: {
+        args: %w(headless disable-gpu window-size=1920,1080),
+      },
+    )
+  )
+end
+Capybara.javascript_driver = :selenium
 require 'capybara-screenshot/rspec'
 
 # Requires supporting ruby files with custom matchers and macros, etc,
@@ -27,8 +37,8 @@ RSpec.configure do |config|
   # config.mock_with :flexmock
   # config.mock_with :rr
 
-  # Syntax sugar to use the FactoryGirl methods directly instead FactoryGirl.create ete.
-  config.include FactoryGirl::Syntax::Methods
+  # Syntax sugar to use the FactoryBot methods directly instead FactoryBot.create ete.
+  config.include FactoryBot::Syntax::Methods
   config.include LoginMacro
   config.include JavascriptMacro
   config.include StubDaemon