```ruby
Gem::Specification.new do |gem|
  gem.name         = "tus-server"
  gem.version      = "1.1.1"

  gem.required_ruby_version = ">= 2.1"

  gem.summary      = "Ruby server implementation of tus.io, the open protocol for resumable file uploads."

  gem.homepage     = "https://github.com/janko-m/tus-ruby-server"
  gem.authors      = ["Janko Marohnić"]
  gem.email        = ["janko.marohnic@gmail.com"]
  gem.license      = "MIT"

  gem.files        = Dir["README.md", "LICENSE.txt", "lib/**/*.rb", "*.gemspec"]
  gem.require_path = "lib"

  gem.add_dependency "roda", "~> 2.19"

  gem.add_development_dependency "rake", "~> 11.1"
  gem.add_development_dependency "minitest", "~> 5.8"
  gem.add_development_dependency "rack-test_app"
  gem.add_development_dependency "cucumber"
  gem.add_development_dependency "unicorn"
  gem.add_development_dependency "mongo"
  gem.add_development_dependency "aws-sdk", "~> 2.0"
  gem.add_development_dependency "goliath"
  gem.add_development_dependency "async-rack", ">= 0.5.1"
end
```

Remove Goliath and async-rack from gemspec
user
```ruby
Gem::Specification.new do |gem|
  gem.name         = "tus-server"
  gem.version      = "1.1.1"

  gem.required_ruby_version = ">= 2.1"

  gem.summary      = "Ruby server implementation of tus.io, the open protocol for resumable file uploads."

  gem.homepage     = "https://github.com/janko-m/tus-ruby-server"
  gem.authors      = ["Janko Marohnić"]
  gem.email        = ["janko.marohnic@gmail.com"]
  gem.license      = "MIT"

  gem.files        = Dir["README.md", "LICENSE.txt", "lib/**/*.rb", "*.gemspec"]
  gem.require_path = "lib"

  gem.add_dependency "roda", "~> 2.19"

  gem.add_development_dependency "rake", "~> 11.1"
  gem.add_development_dependency "minitest", "~> 5.8"
  gem.add_development_dependency "rack-test_app"
  gem.add_development_dependency "cucumber"
  gem.add_development_dependency "unicorn"
  gem.add_development_dependency "mongo"
  gem.add_development_dependency "aws-sdk", "~> 2.0"
end
```
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