--- a/Gemfile	Sat Jun 27 14:46:01 2015 +0900
+++ b/Gemfile	Sun Sep 06 03:52:52 2015 +0900
@@ -4,6 +4,12 @@
 gem "jquery-rails"
 gem "coffee-rails", "~> 4.1.0" # Rails 4.2 default
 gem "autoprefixer-rails"
+gem "bootstrap-sass"
+
+source "https://rails-assets.org" do
+  gem "rails-assets-highlightjs"
+  gem "rails-assets-commonmark"
+end
 
 # Bundle edge Rails instead:
 # gem "rails", :git => "git://github.com/rails/rails.git"