diff --git a/Gemfile b/Gemfile
index 5ba8a9b..587005b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,17 +2,17 @@
 
 source 'https://rubygems.org'
 
+# pin dependency for Ruby 1.9.3 since bundler is not
+# detecting that net-ssh 3 does not work with 1.9.3
 if Gem::Version.new(RUBY_VERSION) <= Gem::Version.new('1.9.3')
   gem 'net-ssh', '~> 2.9'
 end
 
 gem 'rake'
-gem 'inspec', '~> 0.9'
-gem 'rubocop',    '~> 0.23'
+gem 'inspec', '~> 0'
+gem 'rubocop', '~> 0.36.0'
 gem 'highline', '~> 1.6.0'
 
-# pin dependency for Ruby 1.9.3 since bundler is not
-# detecting that net-ssh 3 does not work with 1.9.3
-if Gem::Version.new(RUBY_VERSION) <= Gem::Version.new('1.9.3')
-  gem 'net-ssh', '~> 2.9'
+group :tools do
+  gem 'github_changelog_generator', '~> 1.12.0'
 end