gretel.gemspec in gretel-3.0.9 vs gretel.gemspec in gretel-4.0.0

@@ -4,19 +4,23 @@
 require 'gretel/version'
 
 Gem::Specification.new do |gem|
   gem.name          = "gretel"
   gem.version       = Gretel::VERSION
-  gem.authors       = ["Lasse Bunk"]
-  gem.email         = ["[e-mail]"]
+  gem.authors       = ["Lasse Bunk", "Kazuki Nishikawa"]
+  gem.email         = ["[e-mail]"]
   gem.description   = %q{Gretel is a Ruby on Rails plugin that makes it easy yet flexible to create breadcrumbs.}
   gem.summary       = %q{Flexible Ruby on Rails breadcrumbs plugin.}
-  gem.homepage      = "http://github.com/lassebunk/gretel"
+  gem.homepage      = "http://github.com/kzkn/gretel"
   gem.license       = "MIT"
 
   gem.files         = `git ls-files`.split($/)
   gem.test_files    = gem.files.grep(%r{^test/})
   gem.require_paths = ["lib"]
 
-  gem.add_dependency "rails", ">= 3.1.0"
+  gem.add_dependency "rails", ">= 5.1"
   gem.add_development_dependency "sqlite3"
+  gem.add_development_dependency "jquery-rails"
+  gem.add_development_dependency "test-unit", "~> 3.0"
+  gem.add_development_dependency "simplecov", "~> 0.18.0"
+  gem.add_development_dependency "simplecov-erb", "~> 0.1"
 end