```ruby
$:.push File.expand_path('../lib', __FILE__)
require 'isbm_adaptor/version'

Gem::Specification.new do |s|
  s.name     = 'isbm_adaptor'
  s.version  = IsbmAdaptor::VERSION
  s.authors  = ['Assetricity']
  s.email    = ['info@assetricity.com']
  s.homepage = 'https://github.com/assetricity/isbm_adaptor'
  s.summary  = 'ISBM Adaptor provides a Ruby API for the OpenO&M ISBM specification'
  s.license  = 'MIT'

  s.files    = Dir.glob('lib/**/*') + Dir.glob('wsdls/*') + %w(LICENSE README.md)

  s.add_development_dependency 'rake', '~> 10.1.0'
  s.add_development_dependency 'rspec', '~> 2.14.0'
  s.add_development_dependency 'vcr', '~> 2.5.0'
  s.add_development_dependency 'webmock', '~> 1.13.0'

  s.add_runtime_dependency 'activesupport', '>= 3.0.0'
  s.add_runtime_dependency 'builder', '>= 3.0.0'
  s.add_runtime_dependency 'savon', '>= 2.0.0'
end
```

Update gem dependencies and versions Nokogiri is added since it is called directly ActiveSupport version is relaxed since called methods were introduced in 1.0.0 Builder and Nokogiri versions are relaxed to the minimum of what Savon requires
user
```ruby
$:.push File.expand_path('../lib', __FILE__)
require 'isbm_adaptor/version'

Gem::Specification.new do |s|
  s.name     = 'isbm_adaptor'
  s.version  = IsbmAdaptor::VERSION
  s.authors  = ['Assetricity']
  s.email    = ['info@assetricity.com']
  s.homepage = 'https://github.com/assetricity/isbm_adaptor'
  s.summary  = 'ISBM Adaptor provides a Ruby API for the OpenO&M ISBM specification'
  s.license  = 'MIT'

  s.files    = Dir.glob('lib/**/*') + Dir.glob('wsdls/*') + %w(LICENSE README.md)

  s.add_development_dependency 'rake', '~> 10.1.0'
  s.add_development_dependency 'rspec', '~> 2.14.0'
  s.add_development_dependency 'vcr', '~> 2.8.0'
  s.add_development_dependency 'webmock', '~> 1.16.0'

  s.add_runtime_dependency 'activesupport', '>= 1.0.0'
  s.add_runtime_dependency 'builder', '>= 2.1.2'
  s.add_runtime_dependency 'nokogiri', '>= 1.4.0'
  s.add_runtime_dependency 'savon', '>= 2.0.0'
end
```
assistant