--- a/Gemfile	Mon Jun 13 15:07:38 2016 +0900
+++ b/Gemfile	Sat Jul 02 17:04:25 2016 +0900
@@ -1,8 +1,8 @@
 source "https://rubygems.org"
 
-gem "rails", ">= 5.0.0.rc1", "< 5.1"
+gem "rails", "~> 5.0.0"
 gem "jquery-rails"
-gem "coffee-rails", "~> 4.1.0" # Rails 4.2 default
+gem "coffee-rails", "~> 4.2" # Rails 4.2 default
 gem "bootstrap-sass"
 
 source "https://rails-assets.org" do
@@ -39,6 +39,4 @@
   gem "newrelic_rpm"
 end
 
-group :development do
-  gem "quiet_assets"
-end
+gem "puma", :require => false