Laravel 5.4 validation for age lesser than 18

Laravel 5.4 validation for age lesser than 18:

In laravel 5.4 validation we have only min & max value , which counts the number.

If in such case we have to validate age then this will not help.

For this we have to use regex like this:

            'age' => ['required','numeric','regex:/^(?:[1-9]\d{2,}+|[2-9]\d|1[89])$/i'],

It will not allow age lesser than 18 

Thanks