This thing won't go away. Any suggestions?

rake db:create db:setup --trace

rake aborted!
NameError: uninitialized constant Mysql2::Client::SECURE_CONNECTION
/Library/Ruby/Gems/2.0.0/gems/mysql2-0.3.16/lib/mysql2/client.rb:12:in <class:Client>' /Library/Ruby/Gems/2.0.0/gems/mysql2-0.3.16/lib/mysql2/client.rb:2:inmodule:Mysql2'
/Library/Ruby/Gems/2.0.0/gems/mysql2-0.3.16/lib/mysql2/client.rb:1:in <top (required)>' /Library/Ruby/Gems/2.0.0/gems/mysql2-0.3.16/lib/mysql2.rb:10:in<top (required)>'
/Library/Ruby/Gems/2.0.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:76:in require' /Library/Ruby/Gems/2.0.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:76:inblock (2 levels) in require'
/Library/Ruby/Gems/2.0.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:72:in each' /Library/Ruby/Gems/2.0.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:72:inblock in require'
/Library/Ruby/Gems/2.0.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:61:in each' /Library/Ruby/Gems/2.0.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:61:inrequire'
/Library/Ruby/Gems/2.0.0/gems/bundler-1.10.6/lib/bundler.rb:134:in require' /Users/scolobey/megadev/cookpad/global-web/config/application.rb:16:in<top (required)>'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in require' /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:inrequire'
/Users/scolobey/megadev/cookpad/global-web/Rakefile:4:in <top (required)>' /Library/Ruby/Gems/2.0.0/gems/rake-10.4.2/lib/rake/rake_module.rb:28:inload'
/Library/Ruby/Gems/2.0.0/gems/rake-10.4.2/lib/rake/rake_module.rb:28:in load_rakefile' /Library/Ruby/Gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:689:inraw_load_rakefile'
/Library/Ruby/Gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:94:in block in load_rakefile' /Library/Ruby/Gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:176:instandard_exception_handling'
/Library/Ruby/Gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:93:in load_rakefile' /Library/Ruby/Gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:77:inblock in run'
/Library/Ruby/Gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:176:in standard_exception_handling' /Library/Ruby/Gems/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:75:inrun'
/Library/Ruby/Gems/2.0.0/gems/rake-10.4.2/bin/rake:33:in <top (required)>' /usr/bin/rake:23:inload'
/usr/bin/rake:23:in `