```ruby
# coding: utf-8
lib = File.expand_path('../lib', __FILE__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
require 'pacproxy/version'

Gem::Specification.new do |spec|
  spec.name          = "pacproxy"
  spec.version       = Pacproxy::VERSION
  spec.authors       = ["OTA Hiroshi"]
  spec.email         = ["ota_h@nifty.com"]
  spec.summary       = %q{A proxy server works with proxy.pac}
  spec.description   = %q{A proxy server works with proxy.pac}
  spec.homepage      = ""
  spec.license       = "MIT"

  spec.files         = `git ls-files -z`.split("\x0")
  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 'pac', '~> 1.0.0'

  spec.add_development_dependency 'bundler', '~> 1.6'
  spec.add_development_dependency 'rspec', '~> 3.0.0'
  spec.add_development_dependency 'rake', '~> 10.3.2'
  spec.add_development_dependency 'httpclient', '~> 2.4.0'
  spec.add_development_dependency 'byebug'
end
```

Add therubyracer.gem to gemspec and remove debbuger
user
```ruby
# coding: utf-8
lib = File.expand_path('../lib', __FILE__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
require 'pacproxy/version'

Gem::Specification.new do |spec|
  spec.name          = "pacproxy"
  spec.version       = Pacproxy::VERSION
  spec.authors       = ["OTA Hiroshi"]
  spec.email         = ["ota_h@nifty.com"]
  spec.summary       = %q{A proxy server works with proxy.pac}
  spec.description   = %q{A proxy server works with proxy.pac}
  spec.homepage      = ""
  spec.license       = "MIT"

  spec.files         = `git ls-files -z`.split("\x0")
  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 'pac', '~> 1.0.0'

  spec.add_development_dependency 'bundler', '~> 1.6'
  spec.add_development_dependency 'rspec', '~> 3.0.0'
  spec.add_development_dependency 'rake', '~> 10.3.2'
  spec.add_development_dependency 'httpclient', '~> 2.4.0'
  spec.add_development_dependency 'therubyracer', '~> 0.12.1'
end
```
assistant