diff --git a/Gemfile b/Gemfile
--- a/Gemfile
+++ b/Gemfile
@@ -1,19 +1,20 @@
 source 'https://rubygems.org'
 
-gem 'rails', '~>3.2'
+gem 'rails', '~>4.0.0'
+gem 'activerecord-session_store'
 
 gem 'select2-rails'
 
 # Bundle edge Rails instead:
 # gem 'rails', :git => 'git://github.com/rails/rails.git'
 
-gem 'mysql2'
+gem 'mysql2', '~> 0.3.0'
 
 # Gems used only for assets and not required
 # in production environments by default.
 group :assets do
-  gem 'sass-rails',   '~> 3.2.6'
-  gem 'coffee-rails', '~> 3.2.2'
+  gem 'sass-rails'
+  gem 'coffee-rails'
 
   # See https://github.com/sstephenson/execjs#readme for more supported runtimes
   # gem 'therubyracer', :platforms => :ruby
@@ -21,7 +22,7 @@
   gem 'uglifier'
 end
 
-gem 'prototype-rails'
+# gem 'prototype-rails'
 
 # To use ActiveModel has_secure_password
 # gem 'bcrypt-ruby', '~> 3.0.0'