tty.gemspec in tty-0.0.9 vs tty.gemspec in tty-0.0.10

@@ -15,10 +15,14 @@
   gem.files         = `git ls-files`.split($/)
   gem.executables   = gem.files.grep(%r{^bin/}).map{ |f| File.basename(f) }
   gem.test_files    = gem.files.grep(%r{^(test|spec|features)/})
   gem.require_paths = ["lib"]
 
-  gem.add_development_dependency 'rspec'
-  gem.add_development_dependency 'rake'
-  gem.add_development_dependency 'yard'
+  gem.add_development_dependency 'rspec', '~> 2.14'
+  gem.add_development_dependency 'rake', '~> 10.1'
+  gem.add_development_dependency 'yard', '~> 0.8'
   gem.add_development_dependency 'benchmark_suite'
+  gem.add_development_dependency 'bundler'
+  gem.add_development_dependency 'yard', '~> 0.8'
+  gem.add_development_dependency 'simplecov', '~> 0.7.1'
+  gem.add_development_dependency 'coveralls', '~> 0.6.7'
 end