Gemfile in riddle-2.3.0 vs Gemfile in riddle-2.3.1

@@ -2,7 +2,7 @@
 
 source 'http://rubygems.org'
 
 gemspec
 
-gem 'mysql2',     '0.3.20', :platform => :ruby
+gem 'mysql2',     '0.5.0',  :platform => :ruby
 gem 'jdbc-mysql', '5.1.35', :platform => :jruby