acme-client.gemspec in acme-client-2.0.5 vs acme-client.gemspec in acme-client-2.0.6

@@ -14,13 +14,17 @@
   spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
   spec.require_paths = ['lib']
 
   spec.required_ruby_version = '>= 2.1.0'
 
-  spec.add_development_dependency 'bundler', '~> 1.6', '>= 1.6.9'
-  spec.add_development_dependency 'rake', '~> 10.0'
-  spec.add_development_dependency 'rspec', '~> 3.3', '>= 3.3.0'
-  spec.add_development_dependency 'vcr', '~> 2.9', '>= 2.9.3'
-  spec.add_development_dependency 'webmock', '~> 3.3'
+  spec.add_development_dependency 'bundler', '>= 1.17.3'
+  if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.2')
+    spec.add_development_dependency 'rake', '>= 12.0'
+  else
+    spec.add_development_dependency 'rake', '~> 13.0'
+  end
+  spec.add_development_dependency 'rspec', '~> 3.9'
+  spec.add_development_dependency 'vcr', '~> 2.9'
+  spec.add_development_dependency 'webmock', '~> 3.8'
 
-  spec.add_runtime_dependency 'faraday', '~> 0.9', '>= 0.9.1'
+  spec.add_runtime_dependency 'faraday', '>= 0.17', '< 2.0.0'
 end