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

Gem::Specification.new do |spec|
  spec.name          = 'ruuid-mongoid'
  spec.version       = RUUID::Mongoid::VERSION
  spec.authors       = ['Gabe Evans']
  spec.email         = ['gabe@ga.be']

  spec.summary       = %q{Mongoid extension for storing and retrieving UUIDs on documents.}
  spec.homepage      = 'https://github.com/hashrabbit/ruuid-mongoid'
  spec.license       = 'MIT'

  spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
  spec.require_paths = %w[lib]

  spec.add_dependency 'mongoid', '~> 4.0'
  spec.add_dependency 'ruuid', '~> 0.2.0'

  spec.add_development_dependency 'bundler', '~> 1.9'
  spec.add_development_dependency 'pry', '~> 0.10.1'
  spec.add_development_dependency 'rake', '~> 10.0'
  spec.add_development_dependency 'rspec', '~> 3.2'
  spec.add_development_dependency 'simplecov', '~> 0.10.0'
  spec.add_development_dependency 'yard', '~> 0.8.7'
end
```

Bump ruuid dependency to ~> 0.2.1
user
```ruby
# coding: utf-8
lib = File.expand_path('../lib', __FILE__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
require 'ruuid/mongoid/version'

Gem::Specification.new do |spec|
  spec.name          = 'ruuid-mongoid'
  spec.version       = RUUID::Mongoid::VERSION
  spec.authors       = ['Gabe Evans']
  spec.email         = ['gabe@ga.be']

  spec.summary       = %q{Mongoid extension for storing and retrieving UUIDs on documents.}
  spec.homepage      = 'https://github.com/hashrabbit/ruuid-mongoid'
  spec.license       = 'MIT'

  spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
  spec.require_paths = %w[lib]

  spec.add_dependency 'mongoid', '~> 4.0'
  spec.add_dependency 'ruuid', '~> 0.2.1'

  spec.add_development_dependency 'bundler', '~> 1.9'
  spec.add_development_dependency 'pry', '~> 0.10.1'
  spec.add_development_dependency 'rake', '~> 10.0'
  spec.add_development_dependency 'rspec', '~> 3.2'
  spec.add_development_dependency 'simplecov', '~> 0.10.0'
  spec.add_development_dependency 'yard', '~> 0.8.7'
end
```
assistant