Gemfile.devtools in virtus-0.5.3 vs Gemfile.devtools in virtus-0.5.4

@@ -1,7 +1,7 @@
 group :development do
-  gem 'rake',    '~> 0.9.2'
+  gem 'rake',    '~> 10.0'
   gem 'rspec',   '~> 2.12.0'
   gem 'yard',    '~> 0.8.3'
 end
 
 group :guard do
@@ -25,10 +25,10 @@
   gem 'flay',      '~> 1.4.2'
   gem 'flog',      '~> 2.5.1'
   gem 'reek',      '~> 1.2.8', :git => 'https://github.com/dkubb/reek.git'
   gem 'roodi',     '~> 2.1.0'
   gem 'yardstick', '~> 0.8.0'
-  gem 'mutant',    '~> 0.2.0'
+  gem 'mutant',    '~> 0.2.6'
 
   platforms :ruby_18, :ruby_19 do
     # this indirectly depends on ffi which does not build on ruby-head
     gem 'yard-spellcheck', '~> 0.1.5'
   end