```ruby
require './lib/rgeo/geo_json/version'

::Gem::Specification.new do |spec|
  spec.name = 'rgeo-geojson'
  spec.summary = 'An RGeo module providing GeoJSON encoding and decoding.'
  spec.description = "RGeo is a geospatial data library for Ruby. RGeo::GeoJSON is an optional RGeo module providing GeoJSON encoding and decoding services. This module can be used to communicate with location-based web services that understand the GeoJSON format."
  spec.version = RGeo::GeoJSON::VERSION
  spec.author = 'Daniel Azuma, Tee Parham'
  spec.email = 'dazuma@gmail.com, parhameter@gmail.com'
  spec.homepage = "http://github.com/rgeo/rgeo-geojson"

  spec.required_ruby_version = '>= 1.8.7'
  spec.files = Dir["lib/**/*.rb", "test/**/*.rb", "*.rdoc", 'LICENSE.txt']
  spec.extra_rdoc_files = Dir["*.rdoc"]
  spec.test_files = Dir["test/**/tc_*.rb"]

  spec.platform = ::Gem::Platform::RUBY

  spec.add_dependency 'rgeo', '~> 0.3'

  spec.add_development_dependency 'bundler', '~> 1.6'
  spec.add_development_dependency 'minitest', '~> 5.3'
  spec.add_development_dependency 'rake', '~> 10.3'
end
```

Update gemspe test file list
user
```ruby
require './lib/rgeo/geo_json/version'

::Gem::Specification.new do |spec|
  spec.name = 'rgeo-geojson'
  spec.summary = 'An RGeo module providing GeoJSON encoding and decoding.'
  spec.description = "RGeo is a geospatial data library for Ruby. RGeo::GeoJSON is an optional RGeo module providing GeoJSON encoding and decoding services. This module can be used to communicate with location-based web services that understand the GeoJSON format."
  spec.version = RGeo::GeoJSON::VERSION
  spec.author = 'Daniel Azuma, Tee Parham'
  spec.email = 'dazuma@gmail.com, parhameter@gmail.com'
  spec.homepage = "http://github.com/rgeo/rgeo-geojson"

  spec.required_ruby_version = '>= 1.8.7'
  spec.files = Dir["lib/**/*.rb", "test/**/*.rb", "*.rdoc", 'LICENSE.txt']
  spec.extra_rdoc_files = Dir["*.rdoc"]
  spec.test_files = Dir["test/**/*_test.rb"]

  spec.platform = ::Gem::Platform::RUBY

  spec.add_dependency 'rgeo', '~> 0.3'

  spec.add_development_dependency 'bundler', '~> 1.6'
  spec.add_development_dependency 'minitest', '~> 5.3'
  spec.add_development_dependency 'rake', '~> 10.3'
end
```
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