README.md in onfido-3.4.0 vs README.md in onfido-4.0.0

- old
+ new

@@ -12,11 +12,11 @@
 ## Installation & Usage
 
 ### Installation
 
 ```ruby
-gem onfido, '~> 3.4.0'
+gem onfido, '~> 4.0.0'
 ```
 
 Configure with your API token, region and optional timeout (default value is 30):
 
 ```ruby
@@ -84,10 +84,10 @@
   end
 ```
 
 ## Contributing
 
-This library is automatically generated using [OpenAPI Generator](https://openapi-generator.tech) (version: 7.6.0); therefore all the contributions, except tests files, should target [Onfido OpenAPI specification repository](https://github.com/onfido/onfido-openapi-spec/tree/master) instead of this repository.
+This library is automatically generated using [OpenAPI Generator](https://openapi-generator.tech) (version: 7.9.0); therefore all the contributions, except tests files, should target [Onfido OpenAPI specification repository](https://github.com/onfido/onfido-openapi-spec/tree/master) instead of this repository.
 
 For contributions to the tests instead, please follow the steps below:
 
 1. [Fork](https://github.com/onfido/onfido-ruby/fork) repository
 2. Create your feature branch (`git checkout -b my-new-feature`)