Gemfile in alchemy_cms-3.1.1 vs Gemfile in alchemy_cms-3.1.3

@@ -5,10 +5,10 @@
 if ENV['RAILS_VERSION']
   gem 'rails', ENV['RAILS_VERSION']
 end
 
 gem 'sqlite3' if ENV['DB'].nil? || ENV['DB'] == 'sqlite'
-gem 'mysql2'  if ENV['DB'] == 'mysql'
+gem 'mysql2', '~> 0.3.18' if ENV['DB'] == 'mysql'
 gem 'pg'      if ENV['DB'] == 'postgresql'
 
 group :development, :test do
   gem 'jasmine-rails',        github: 'searls/jasmine-rails'
   gem 'jasmine-jquery-rails', github: 'travisjeffery/jasmine-jquery-rails'