nightcrawler_swift.gemspec in nightcrawler_swift-0.7.0 vs nightcrawler_swift.gemspec in nightcrawler_swift-0.8.0

@@ -17,10 +17,11 @@
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
   spec.add_dependency "rest-client"
-  spec.add_dependency "multi_mime",  ">= 1.0.1"
+  spec.add_dependency "multi_mime",      ">= 1.0.1"
+  spec.add_dependency "concurrent-ruby", "~> 0.8.0"
 
   spec.add_development_dependency "bundler", "~> 1.6"
   spec.add_development_dependency "rake"
   spec.add_development_dependency "rspec"
   spec.add_development_dependency "codeclimate-test-reporter"