umbra-rb.gemspec in umbra-rb-0.2.0 vs umbra-rb.gemspec in umbra-rb-0.3.0.pre

@@ -26,12 +26,15 @@
   spec.require_paths = ['lib']
 
   spec.add_development_dependency 'bundler', '~> 2.0'
   spec.add_development_dependency 'carwow_rubocop'
   spec.add_development_dependency 'pry'
-  spec.add_development_dependency 'rake', '~> 10.0'
+  spec.add_development_dependency 'rack'
+  spec.add_development_dependency 'rake', '~> 13.0'
   spec.add_development_dependency 'rspec', '~> 3.0'
+  spec.add_development_dependency 'webmock', '~> 3'
 
+  spec.add_dependency 'concurrent-ruby', '~> 1.1'
   spec.add_dependency 'multi_json', '~> 1.13'
   spec.add_dependency 'oj', '~> 3.9'
   spec.add_dependency 'redis', '~> 4.1'
   spec.add_dependency 'typhoeus', '~> 1.3'
 end