```ruby
gem 'mongoid', '2.0.0.beta.18'
gem 'bson_ext', '1.0.4'

stategies << lambda do
  generate 'mongoid:config'
  run 'cp config/mongoid.yml config/mongoid.yml.example'
end
```

Upgrade Mongoid recipe to version 2.0.0.beta.19
user
```ruby
gem 'mongoid', '2.0.0.beta.19'
gem 'bson_ext', '1.0.9'

stategies << lambda do
  generate 'mongoid:config'
  run 'cp config/mongoid.yml config/mongoid.yml.example'
end
```
assistant