Gemfile in strings-0.1.1 vs Gemfile in strings-0.1.2

@@ -3,13 +3,13 @@
 git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
 
 gemspec
 
 group :metrics do
-  gem 'coveralls', '~> 0.8.1'
-  gem 'simplecov', '~> 0.10.0'
+  gem 'coveralls', '~> 0.8.22'
+  gem 'simplecov', '~> 0.16.1'
   gem 'yardstick', '~> 0.9.9'
 end
 
 group :benchmarks do
-  gem 'benchmark-ips'
+  gem 'benchmark-ips', '~> 2.7.2'
 end