diff --git a/Gemfile b/Gemfile
index e64080e..9af33d8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,8 +1,9 @@
+# coding: utf-8
 source 'https://rubygems.org'
 
 ruby '2.3.0'
 
-gem 'rails', '>= 5.0.0.beta2', '< 5.1'
+gem 'rails', '< 5.1'
 gem 'sass-rails', '~> 5.0'
 gem 'jquery-rails'
 gem 'compass-rails', github: 'Compass/compass-rails', branch: 'master'
@@ -31,9 +32,7 @@ gem 'react-rails'
 # https://github.com/amatsuda/kaminari/issues/774
 gem 'kaminari', github: 'amatsuda/kaminari'
 gem 'redis', '~> 3.0'
-# NOTE: 下記PRがマージされるまではエラーが出るので、個人のブランチを使用
-#  https://github.com/heroku/rails_stdout_logging/pull/20
-gem 'rails_stdout_logging', github: 'kibitan/rails_stdout_logging', branch: 'compatible_rails5'
+gem 'rails_stdout_logging'
 
 group :development do
   gem 'web-console', '~> 3.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index b8807ee..c2dcc62 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,33 +1,26 @@
 GIT
   remote: git://github.com/Compass/compass-rails.git
-  revision: 5b16c6c6ef8ad28f84e61a460602592fea5fc810
+  revision: 86afb2c45ae329b3720be102c549612703e16402
   branch: master
   specs:
-    compass-rails (3.0.0)
+    compass-rails (3.0.2)
       compass (~> 1.0.0)
       sass-rails (< 5.1)
       sprockets (< 4.0)
 
 GIT
   remote: git://github.com/amatsuda/kaminari.git
-  revision: 5629661f84ad808411f08bcea9c5513f3bb58265
+  revision: 7d3dbd8e396ddc30454d1bf156a00f21ed9adaf6
   specs:
     kaminari (1.0.0.alpha)
       actionpack (>= 3.0.0)
       activesupport (>= 3.0.0)
 
-GIT
-  remote: git://github.com/kibitan/rails_stdout_logging.git
-  revision: 02a59481034e70e68f608b3bf1df96f75379d5a8
-  branch: compatible_rails5
-  specs:
-    rails_stdout_logging (0.0.4)
-
 GIT
   remote: git://github.com/metaskills/less-rails.git
-  revision: 7e8e7a1123c206869cea86acfdb01b3835f001c1
+  revision: 05186ebeea3a1dce50852b4d1285f31eb6585613
   specs:
-    less-rails (2.7.1)
+    less-rails (2.8.0)
       actionpack (>= 4.0)
       less (~> 2.6.0)
       sprockets (> 2, < 4)
@@ -36,53 +29,50 @@ GIT
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (5.0.0.beta2)
-      actionpack (= 5.0.0.beta2)
+    actioncable (5.0.0)
+      actionpack (= 5.0.0)
       nio4r (~> 1.2)
       websocket-driver (~> 0.6.1)
-    actionmailer (5.0.0.beta2)
-      actionpack (= 5.0.0.beta2)
-      actionview (= 5.0.0.beta2)
-      activejob (= 5.0.0.beta2)
+    actionmailer (5.0.0)
+      actionpack (= 5.0.0)
+      actionview (= 5.0.0)
+      activejob (= 5.0.0)
       mail (~> 2.5, >= 2.5.4)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-    actionpack (5.0.0.beta2)
-      actionview (= 5.0.0.beta2)
-      activesupport (= 5.0.0.beta2)
-      rack (~> 2.x)
+      rails-dom-testing (~> 2.0)
+    actionpack (5.0.0)
+      actionview (= 5.0.0)
+      activesupport (= 5.0.0)
+      rack (~> 2.0)
       rack-test (~> 0.6.3)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
+      rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.0.0.beta2)
-      activesupport (= 5.0.0.beta2)
+    actionview (5.0.0)
+      activesupport (= 5.0.0)
       builder (~> 3.1)
       erubis (~> 2.7.0)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
+      rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    activejob (5.0.0.beta2)
-      activesupport (= 5.0.0.beta2)
+    activejob (5.0.0)
+      activesupport (= 5.0.0)
       globalid (>= 0.3.6)
-    activemodel (5.0.0.beta2)
-      activesupport (= 5.0.0.beta2)
-    activerecord (5.0.0.beta2)
-      activemodel (= 5.0.0.beta2)
-      activesupport (= 5.0.0.beta2)
+    activemodel (5.0.0)
+      activesupport (= 5.0.0)
+    activerecord (5.0.0)
+      activemodel (= 5.0.0)
+      activesupport (= 5.0.0)
       arel (~> 7.0)
-    activesupport (5.0.0.beta2)
-      concurrent-ruby (~> 1.0)
+    activesupport (5.0.0)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (~> 0.7)
-      json (~> 1.7, >= 1.7.7)
-      method_source
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    annotate (2.7.0)
+    annotate (2.7.1)
       activerecord (>= 3.2, < 6.0)
-      rake (~> 10.4)
+      rake (>= 10.4, < 12.0)
     arel (7.0.0)
-    ast (2.2.0)
-    autoprefixer-rails (6.3.1)
+    ast (2.3.0)
+    autoprefixer-rails (6.3.7)
       execjs
-      json
     babel-source (5.8.35)
     babel-transpiler (0.7.0)
       babel-source (>= 4.0, < 6)
@@ -92,22 +82,16 @@ GEM
     bootstrap-sass (3.3.6)
       autoprefixer-rails (>= 5.2.1)
       sass (>= 3.3.4)
-    browserify-rails (2.2.1)
-      railties (>= 4.0.0, < 5.0)
-      sprockets (> 3.0.2)
+    browserify-rails (3.1.0)
+      railties (>= 4.0.0, < 5.1)
+      sprockets (>= 3.5.2)
     builder (3.2.2)
-    bullet (5.0.0)
+    bullet (5.1.1)
       activesupport (>= 3.0.0)
-      uniform_notifier (~> 1.9.0)
-    byebug (8.2.1)
-    chunky_png (1.3.5)
-    coderay (1.1.0)
-    coffee-rails (4.1.1)
-      coffee-script (>= 2.2.0)
-      railties (>= 4.0.0, < 5.1.x)
-    coffee-script (2.4.1)
-      coffee-script-source
-      execjs
+      uniform_notifier (~> 1.10.0)
+    byebug (9.0.5)
+    chunky_png (1.3.6)
+    coderay (1.1.1)
     coffee-script-source (1.10.0)
     commonjs (0.2.7)
     compass (1.0.3)
@@ -122,174 +106,182 @@ GEM
       sass (>= 3.3.0, < 3.5)
     compass-import-once (1.0.5)
       sass (>= 3.2, < 3.5)
-    concurrent-ruby (1.0.0)
+    concurrent-ruby (1.0.2)
     connection_pool (2.2.0)
     debug_inspector (0.0.2)
     diff-lcs (1.2.5)
-    dotenv (2.1.0)
-    dotenv-rails (2.1.0)
-      dotenv (= 2.1.0)
+    dotenv (2.1.1)
+    dotenv-rails (2.1.1)
+      dotenv (= 2.1.1)
       railties (>= 4.0, < 5.1)
     erubis (2.7.0)
-    execjs (2.6.0)
-    factory_girl (4.5.0)
+    eventmachine (1.2.0.1)
+    execjs (2.7.0)
+    factory_girl (4.7.0)
       activesupport (>= 3.0.0)
-    factory_girl_rails (4.5.0)
-      factory_girl (~> 4.5.0)
+    factory_girl_rails (4.7.0)
+      factory_girl (~> 4.7.0)
       railties (>= 3.0.0)
-    faker (1.6.3)
-      i18n (~> 0.5)
-    faraday (0.9.0)
+    faraday (0.9.2)
       multipart-post (>= 1.2, < 3)
     faraday_middleware (0.10.0)
       faraday (>= 0.7.4, < 0.10)
-    ffi (1.9.10)
-    font-awesome-sass (4.5.0)
+    faye-websocket (0.9.2)
+      eventmachine (>= 0.12.0)
+      websocket-driver (>= 0.5.1)
+    ffi (1.9.13)
+    font-awesome-sass (4.6.2)
       sass (>= 3.2)
     gemoji (2.1.0)
     globalid (0.3.6)
       activesupport (>= 4.1.0)
-    hashie (3.4.3)
+    hashie (3.4.4)
     hirb (0.7.3)
     hirb-unicode (0.0.5)
       hirb (~> 0.5)
       unicode-display_width (~> 0.1.1)
-    httpauth (0.2.1)
     i18n (0.7.0)
-    jbuilder (2.4.0)
+    jbuilder (2.5.0)
       activesupport (>= 3.0.0, < 5.1)
       multi_json (~> 1.2)
-    jquery-rails (4.1.0)
-      rails-dom-testing (~> 1.0)
+    jquery-rails (4.1.1)
+      rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (1.8.3)
+    jwt (1.5.4)
     less (2.6.0)
       commonjs (~> 0.2.7)
     libv8 (3.16.14.15)
     loofah (2.0.3)
       nokogiri (>= 1.5.9)
-    mail (2.6.3)
-      mime-types (>= 1.16, < 3)
+    mail (2.6.4)
+      mime-types (>= 1.16, < 4)
     method_source (0.8.2)
-    mime-types (2.99)
-    mini_portile2 (2.0.0)
-    minitest (5.8.4)
-    multi_json (1.11.2)
+    mime-types (3.1)
+      mime-types-data (~> 3.2015)
+    mime-types-data (3.2016.0521)
+    mini_portile2 (2.1.0)
+    minitest (5.9.0)
+    multi_json (1.12.1)
+    multi_xml (0.5.5)
     multipart-post (2.0.0)
-    mysql2 (0.3.20)
+    mysql2 (0.3.21)
     nio4r (1.2.1)
-    nokogiri (1.6.7.2)
-      mini_portile2 (~> 2.0.0.rc2)
-    oauth2 (0.6.1)
-      faraday (~> 0.7)
-      httpauth (~> 0.1)
+    nokogiri (1.6.8)
+      mini_portile2 (~> 2.1.0)
+      pkg-config (~> 1.1.7)
+    oauth2 (1.2.0)
+      faraday (>= 0.8, < 0.10)
+      jwt (~> 1.0)
       multi_json (~> 1.3)
+      multi_xml (~> 0.5)
+      rack (>= 1.2, < 3)
     omniauth (1.3.1)
       hashie (>= 1.2, < 4)
       rack (>= 1.0, < 3)
-    omniauth-google-oauth2 (0.2.2)
-      omniauth (~> 1.0)
-      omniauth-oauth2
-    omniauth-oauth2 (1.0.2)
-      oauth2 (~> 0.6.0)
-      omniauth (~> 1.0)
-    parser (2.3.0.2)
+    omniauth-google-oauth2 (0.4.1)
+      jwt (~> 1.5.2)
+      multi_json (~> 1.3)
+      omniauth (>= 1.1.1)
+      omniauth-oauth2 (>= 1.3.1)
+    omniauth-oauth2 (1.4.0)
+      oauth2 (~> 1.0)
+      omniauth (~> 1.2)
+    parser (2.3.1.2)
       ast (~> 2.2)
+    pkg-config (1.1.7)
     powerpack (0.1.1)
-    pry (0.10.3)
+    pry (0.10.4)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    pry-byebug (3.3.0)
-      byebug (~> 8.0)
+    pry-byebug (3.4.0)
+      byebug (~> 9.0)
       pry (~> 0.10)
-    pry-doc (0.8.0)
+    pry-doc (0.9.0)
       pry (~> 0.9)
       yard (~> 0.8)
     pry-rails (0.3.4)
       pry (>= 0.9.10)
-    puma (2.16.0)
-    rack (2.0.0.alpha)
-      json
+    puma (3.4.0)
+    rack (2.0.1)
     rack-test (0.6.3)
       rack (>= 1.0)
-    rails (5.0.0.beta2)
-      actioncable (= 5.0.0.beta2)
-      actionmailer (= 5.0.0.beta2)
-      actionpack (= 5.0.0.beta2)
-      actionview (= 5.0.0.beta2)
-      activejob (= 5.0.0.beta2)
-      activemodel (= 5.0.0.beta2)
-      activerecord (= 5.0.0.beta2)
-      activesupport (= 5.0.0.beta2)
+    rails (5.0.0)
+      actioncable (= 5.0.0)
+      actionmailer (= 5.0.0)
+      actionpack (= 5.0.0)
+      actionview (= 5.0.0)
+      activejob (= 5.0.0)
+      activemodel (= 5.0.0)
+      activerecord (= 5.0.0)
+      activesupport (= 5.0.0)
       bundler (>= 1.3.0, < 2.0)
-      railties (= 5.0.0.beta2)
+      railties (= 5.0.0)
       sprockets-rails (>= 2.0.0)
-    rails-deprecated_sanitizer (1.0.3)
-      activesupport (>= 4.2.0.alpha)
-    rails-dom-testing (1.0.7)
-      activesupport (>= 4.2.0.beta, < 5.0)
+    rails-dom-testing (2.0.1)
+      activesupport (>= 4.2.0, < 6.0)
       nokogiri (~> 1.6.0)
-      rails-deprecated_sanitizer (>= 1.0.1)
     rails-html-sanitizer (1.0.3)
       loofah (~> 2.0)
     rails_12factor (0.0.3)
       rails_serve_static_assets
       rails_stdout_logging
     rails_serve_static_assets (0.0.5)
-    railties (5.0.0.beta2)
-      actionpack (= 5.0.0.beta2)
-      activesupport (= 5.0.0.beta2)
+    rails_stdout_logging (0.0.5)
+    railties (5.0.0)
+      actionpack (= 5.0.0)
+      activesupport (= 5.0.0)
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rainbow (2.1.0)
-    rake (10.5.0)
+    rake (11.2.2)
     rb-fsevent (0.9.7)
-    rb-inotify (0.9.5)
+    rb-inotify (0.9.7)
       ffi (>= 0.5.0)
-    react-rails (1.5.0)
+    react-rails (1.8.0)
       babel-transpiler (>= 0.7.0)
       coffee-script-source (~> 1.8)
       connection_pool
       execjs
-      rails (>= 3.2)
+      railties (>= 3.2)
       tilt
     redcarpet (3.3.4)
-    redis (3.2.2)
+    redis (3.3.0)
     ref (2.0.0)
-    rspec (3.1.0)
-      rspec-core (~> 3.1.0)
-      rspec-expectations (~> 3.1.0)
-      rspec-mocks (~> 3.1.0)
+    rspec (3.5.0)
+      rspec-core (~> 3.5.0)
+      rspec-expectations (~> 3.5.0)
+      rspec-mocks (~> 3.5.0)
     rspec-collection_matchers (1.1.2)
       rspec-expectations (>= 2.99.0.beta1)
-    rspec-core (3.1.7)
-      rspec-support (~> 3.1.0)
-    rspec-expectations (3.1.2)
+    rspec-core (3.5.1)
+      rspec-support (~> 3.5.0)
+    rspec-expectations (3.5.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.1.0)
-    rspec-mocks (3.1.3)
-      rspec-support (~> 3.1.0)
-    rspec-rails (3.1.0)
+      rspec-support (~> 3.5.0)
+    rspec-mocks (3.5.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.5.0)
+    rspec-rails (3.5.1)
       actionpack (>= 3.0)
       activesupport (>= 3.0)
       railties (>= 3.0)
-      rspec-core (~> 3.1.0)
-      rspec-expectations (~> 3.1.0)
-      rspec-mocks (~> 3.1.0)
-      rspec-support (~> 3.1.0)
-    rspec-support (3.1.2)
+      rspec-core (~> 3.5.0)
+      rspec-expectations (~> 3.5.0)
+      rspec-mocks (~> 3.5.0)
+      rspec-support (~> 3.5.0)
+    rspec-support (3.5.0)
     rubocop (0.36.0)
       parser (>= 2.3.0.0, < 3.0)
       powerpack (~> 0.1)
       rainbow (>= 1.99.1, < 3.0)
       ruby-progressbar (~> 1.7)
-    ruby-progressbar (1.7.5)
-    sass (3.4.21)
-    sass-rails (5.0.4)
-      railties (>= 4.0.0, < 5.0)
+    ruby-progressbar (1.8.1)
+    sass (3.4.22)
+    sass-rails (5.0.5)
+      railties (>= 4.0.0, < 6)
       sass (~> 3.1)
       sprockets (>= 2.8, < 4.0)
       sprockets-rails (>= 2.0, < 4.0)
@@ -297,16 +289,17 @@ GEM
     simple_form (3.2.1)
       actionpack (> 4, < 5.1)
       activemodel (> 4, < 5.1)
-    slack-api (0.0.4)
-      faraday (>= 0.7, <= 0.9)
+    slack-api (1.2.3)
+      faraday (>= 0.7, < 0.10)
       faraday_middleware (~> 0.8)
+      faye-websocket (~> 0.9.2)
       multi_json (~> 1.0, >= 1.0.3)
     slop (3.6.0)
-    spring (1.6.2)
-    sprockets (3.5.2)
+    spring (1.7.2)
+    sprockets (3.6.3)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
-    sprockets-rails (3.0.0)
+    sprockets-rails (3.1.1)
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
@@ -315,24 +308,25 @@ GEM
       ref
     thor (0.19.1)
     thread_safe (0.3.5)
-    tilt (2.0.2)
-    turbolinks (2.5.3)
-      coffee-rails
+    tilt (2.0.5)
+    turbolinks (5.0.0)
+      turbolinks-source (~> 5)
+    turbolinks-source (5.0.0)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
-    uglifier (2.7.2)
-      execjs (>= 0.3.0)
-      json (>= 1.8.0)
+    uglifier (3.0.0)
+      execjs (>= 0.3.0, < 3)
     unicode-display_width (0.1.1)
-    uniform_notifier (1.9.0)
-    web-console (3.1.1)
-      activemodel (>= 4.2)
+    uniform_notifier (1.10.0)
+    web-console (3.3.1)
+      actionview (>= 5.0)
+      activemodel (>= 5.0)
       debug_inspector
-      railties (>= 4.2)
-    websocket-driver (0.6.3)
+      railties (>= 5.0)
+    websocket-driver (0.6.4)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.2)
-    yard (0.8.7.6)
+    yard (0.9.0)
 
 PLATFORMS
   ruby
@@ -364,9 +358,9 @@ DEPENDENCIES
   pry-doc
   pry-rails
   puma
-  rails (>= 5.0.0.beta2, < 5.1)
+  rails (< 5.1)
   rails_12factor
-  rails_stdout_logging!
+  rails_stdout_logging
   react-rails
   redcarpet
   redis (~> 3.0)
@@ -383,5 +377,8 @@ DEPENDENCIES
   uglifier (>= 1.3.0)
   web-console (~> 3.0)
 
+RUBY VERSION
+   ruby 2.3.0p0
+
 BUNDLED WITH
    1.12.5