This is not needed. While it is certainly annoying to see

```
You are using an old or stdlib version of json gem
Please upgrade to the recent version by adding this to your Gemfile:

gem 'json', '~> 1.7.7'
```

everywhere, it can be safely ignored for most use cases. More details at [this answer][SO answer] to a SO question.

[SO answer]: http://stackoverflow.com/a/16577556/2360942