```ruby
# -*- encoding: utf-8 -*
lib = File.expand_path('../lib/', __FILE__)
$:.unshift lib unless $:.include?(lib)
require 'engineyard-serverside/version'

Gem::Specification.new do |s|
  s.name = "engineyard-serverside"
  s.version = EY::Serverside::VERSION
  s.platform = Gem::Platform::RUBY
  s.author = "EY Cloud Team"
  s.email = "cloud@engineyard.com"
  s.homepage = "http://github.com/engineyard/engineyard-serverside"
  s.summary = "A gem that deploys ruby applications on EY Cloud instances"

  s.files = Dir.glob("{bin,lib}/**/*") + %w(LICENSE)
  s.executables = ["engineyard-serverside"]
  s.default_executable = "engineyard-serverside"
  s.require_path = 'lib'
  s.add_development_dependency('rspec', '= 1.3.2')
  s.add_development_dependency('rake', '>= 0.9.2.2')

  s.rubygems_version = %q{1.3.6}
  s.test_files = Dir.glob("spec/**/*")
end
```

Use required_rubygems_version to indicate dependency, rubygems_version indicates what the gem was built with.
user
```ruby
# -*- encoding: utf-8 -*
lib = File.expand_path('../lib/', __FILE__)
$:.unshift lib unless $:.include?(lib)
require 'engineyard-serverside/version'

Gem::Specification.new do |s|
  s.name = "engineyard-serverside"
  s.version = EY::Serverside::VERSION
  s.platform = Gem::Platform::RUBY
  s.author = "EY Cloud Team"
  s.email = "cloud@engineyard.com"
  s.homepage = "http://github.com/engineyard/engineyard-serverside"
  s.summary = "A gem that deploys ruby applications on EY Cloud instances"

  s.files = Dir.glob("{bin,lib}/**/*") + %w(LICENSE)
  s.executables = ["engineyard-serverside"]
  s.default_executable = "engineyard-serverside"
  s.require_path = 'lib'
  s.add_development_dependency('rspec', '= 1.3.2')
  s.add_development_dependency('rake', '>= 0.9.2.2')

  s.required_rubygems_version = %q{1.3.6}
  s.test_files = Dir.glob("spec/**/*")
end
```
assistant