dot in parameter - Lumen

I am working on Lumen app where I have URL like this http://localhost:8000/membership/61.515162.467 and I have defined URL like this.

$app->get('membership/{orderId:[0-9\.]+}', [
    'as' => 'membership', 'uses' => 'MembershipController@show'
]);

But apparently this is not working it is not matching anything. Is there anyway to use . in parameter or is it not possible.

via nicholasnet