```ruby
$: << File.expand_path("../lib", __FILE__)
require "representative/version"

Gem::Specification.new do |gem|

  gem.name = "representative"
  gem.summary = "Builds XML representations of your Ruby objects"
  gem.homepage = "http://github.com/mdub/representative"
  gem.authors = ["Mike Williams"]
  gem.email = "mdub@dogbiscuit.org"

  gem.version = Representative::VERSION
  gem.platform = Gem::Platform::RUBY
  gem.add_runtime_dependency("activesupport", ">= 2.2.2")

  gem.require_path = "lib"
  gem.files = Dir["lib/**/*", "examples/**/*", "README.markdown", "LICENSE"]
  gem.test_files = Dir["spec/**/*", "Rakefile"]

end
```

Update the gemspec, noting support for JSON.
user
```ruby
$: << File.expand_path("../lib", __FILE__)
require "representative/version"

Gem::Specification.new do |gem|

  gem.name = "representative"
  gem.summary = "Builds XML and JSON representations of your Ruby objects"
  gem.homepage = "http://github.com/mdub/representative"
  gem.authors = ["Mike Williams"]
  gem.email = "mdub@dogbiscuit.org"

  gem.version = Representative::VERSION
  gem.platform = Gem::Platform::RUBY
  gem.add_runtime_dependency("activesupport", ">= 2.2.2")

  gem.require_path = "lib"
  gem.files = Dir["lib/**/*", "examples/**/*", "README.markdown", "LICENSE"]
  gem.test_files = Dir["spec/**/*", "Rakefile"]

end
```
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