diff --git a/Gemfile.devtools b/Gemfile.devtools
index 16f7a10c..2c3bcfd5 100644
--- a/Gemfile.devtools
+++ b/Gemfile.devtools
@@ -21,7 +21,7 @@ group :guard do
   gem 'rb-inotify', '~> 0.9.0', :require => false
 
   # Remove this one https://github.com/guard/listen/pull/78 is released
-  gem 'listen', '~> 0.7.2', :git => 'https://github.com/guard/listen'
+  gem 'listen', '~> 0.7.2', :git => 'https://github.com/guard/listen.git'
 
   # notification handling
   gem 'libnotify',               '~> 0.8.0', :require => false
@@ -35,17 +35,13 @@ group :metrics do
   gem 'flog',      '~> 2.5.3'
   gem 'reek',      '~> 1.2.13', :git => 'https://github.com/troessner/reek.git', :ref => 'ef77fcecaa21c9ebcbe4d9a79d41b0e70196bf18'
   gem 'roodi',     '~> 2.1.0'
-  gem 'yardstick', '~> 0.9.0'
+  gem 'yardstick', '~> 0.9.1'
 
   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
 
-  platforms :mri_18 do
-    gem 'rcov', '~> 1.0.0'
-  end
-
   platforms :mri_19 do
     gem 'simplecov', '~> 0.7.1'
   end