rotp.gemspec in rotp-5.1.0 vs rotp.gemspec in rotp-6.0.0

@@ -2,26 +2,25 @@
 
 Gem::Specification.new do |s|
   s.name        = 'rotp'
   s.version     = ROTP::VERSION
   s.platform    = Gem::Platform::RUBY
+  s.required_ruby_version = '~> 2.3'
   s.license     = 'MIT'
   s.authors     = ['Mark Percival']
   s.email       = ['[e-mail]']
   s.homepage    = 'http://github.com/mdp/rotp'
   s.summary     = 'A Ruby library for generating and verifying one time passwords'
   s.description = 'Works for both HOTP and TOTP, and includes QR Code provisioning'
 
-  s.rubyforge_project = 'rotp'
-
   s.files         = `git ls-files`.split("\n")
   s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
   s.executables   = `git ls-files -- bin/*`.split("\n").map { |f| File.basename(f) }
   s.require_paths = ['lib']
 
-  s.add_runtime_dependency 'addressable', '~> 2.5'
+  s.add_runtime_dependency 'addressable', '~> 2.7'
 
-  s.add_development_dependency 'rake', '~> 10.5'
+  s.add_development_dependency "rake", "~> 13.0"
   s.add_development_dependency 'rspec', '~> 3.5'
   s.add_development_dependency 'simplecov', '~> 0.12'
   s.add_development_dependency 'timecop', '~> 0.8'
 end