diff --git a/Gemfile.devtools b/Gemfile.devtools
index 9696b9fa..91c7518d 100644
--- a/Gemfile.devtools
+++ b/Gemfile.devtools
@@ -3,7 +3,7 @@
 group :development do
   gem 'rake',  '~> 10.0.4'
   gem 'rspec', '~> 2.13.0'
-  gem 'yard',  '~> 0.8.5.2'
+  gem 'yard',  '~> 0.8.6'
 end
 
 group :yard do
@@ -13,7 +13,7 @@ end
 group :guard do
   gem 'guard',         '~> 1.7.0'
   gem 'guard-bundler', '~> 1.0.0'
-  gem 'guard-rspec',   '~> 2.5.2'
+  gem 'guard-rspec',   '~> 2.5.3'
 
   # file system change event handling
   gem 'listen',     '~> 0.7.3'
@@ -29,12 +29,12 @@ end
 
 group :metrics do
   gem 'backports',       '~> 3.3', '>= 3.3.0'
-  gem 'coveralls',       '~> 0.6.4'
-  gem 'flay',            '~> 2.1.0'
+  gem 'coveralls',       '~> 0.6.5'
+  gem 'flay',            '~> 2.2.0'
   gem 'flog',            '~> 3.2.3'
   gem 'reek',            '~> 1.3.1', :git => 'https://github.com/troessner/reek.git'
   gem 'simplecov',       '~> 0.7.1'
-  gem 'yardstick',       '~> 0.9.5'
+  gem 'yardstick',       '~> 0.9.6'
   gem 'yard-spellcheck', '~> 0.1.5'
 
   platforms :rbx do