# Request validator

By default, request validator is selected based on detected specification version.

In order to explicitly validate a:

- OpenAPI 3.0 spec, import `V30RequestValidator`

- OpenAPI 3.1 spec, import `V31RequestValidator` or `V31WebhookRequestValidator`

      from openapi_core import V31RequestValidator

      config = Config(
         request_validator_cls=V31RequestValidator,
      )
      openapi = OpenAPI.from_file_path('openapi.json', config=config)
      openapi.validate_request(request)

You can also explicitly import `V3RequestValidator` which is a shortcut to the latest OpenAPI v3 version.