dogviz.gemspec in dogviz-0.0.21 vs dogviz.gemspec in dogviz-0.0.22

@@ -16,12 +16,14 @@
 
   spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
   spec.require_paths = ["lib"]
 
   spec.add_development_dependency "bundler", "~> 1.10"
-  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "rake", "~> 12.0"
   spec.add_development_dependency 'simplecov', '~> 0'
   spec.add_development_dependency 'colorize', '~> 0'
   spec.add_development_dependency 'nokogiri', '~> 1.6'
+  spec.add_development_dependency 'test-unit'
 
   spec.add_dependency 'ruby-graphviz', '~> 1'
+  spec.add_dependency 'json', '~> 2.1.0'
 end