```ruby
# encoding: UTF-8
Gem::Specification.new do |s|
  s.platform    = Gem::Platform::RUBY
  s.name        = 'spree_sidr'
  s.version     = '1.0.0'
  s.summary     = 'TODO: Add gem summary here'
  s.description = 'TODO: Add (optional) gem description here'
  s.required_ruby_version = '>= 1.9.3'

  s.author    = 'John Dyer'
  s.email     = 'jdyer@spreecommerce.com'
  s.homepage  = 'http://www.spreecommerce.com'

  s.files       = `git ls-files`.split("\n")
  s.require_path = 'lib'
  s.requirements << 'none'

  s.add_dependency 'spree_core', '~> 2.0.4'
end
```

Change spree version requirement in gemspec
user
```ruby
# encoding: UTF-8
Gem::Specification.new do |s|
  s.platform    = Gem::Platform::RUBY
  s.name        = 'spree_sidr'
  s.version     = '1.0.0'
  s.summary     = 'TODO: Add gem summary here'
  s.description = 'TODO: Add (optional) gem description here'
  s.required_ruby_version = '>= 1.9.3'

  s.author    = 'John Dyer'
  s.email     = 'jdyer@spreecommerce.com'
  s.homepage  = 'http://www.spreecommerce.com'

  s.files       = `git ls-files`.split("\n")
  s.require_path = 'lib'
  s.requirements << 'none'

  s.add_dependency 'spree_core', '~> 2.0.0'
end
```
assistant