cloudstrap.gemspec in cloudstrap-0.42.2.pre vs cloudstrap.gemspec in cloudstrap-0.42.3.pre

@@ -12,9 +12,10 @@
   gem.executables   = `git ls-files -- bin/*`.split("\n").map { |f| File.basename(f) }
   gem.require_paths = ['lib']
 
   gem.add_runtime_dependency 'aws-sdk', '~> 2.5', '>= 2.5.0'
   gem.add_runtime_dependency 'contracts', '~> 0.14', '>= 0.14.0'
+  gem.add_runtime_dependency 'concurrent-ruby', '~> 1.0', '>= 1.0.4'
   gem.add_runtime_dependency 'retries', '~> 0.0.5', '>= 0.0.5'
   gem.add_runtime_dependency 'moneta', '~> 0.8', '>= 0.8.0'
   gem.add_runtime_dependency 'sshkey', '~> 1.8', '>= 1.8.0'
   gem.add_runtime_dependency 'sshkit', '~> 1.11', '>= 1.11.0'
   gem.add_runtime_dependency 'java-properties', '~> 0.1', '>= 0.1.1'