Laravel Collective Form checkbox always checked

I'm using Laravel Collective for Forms and having an issue with checkbox.

Here is what I'm doing :

{!! Form::checkbox('independent',null,['class'=>'form-control', 'required' => 'required'])!!}

I've tried changing values for "null", added one more parameters as suggested by many while googling for solution but nothing seems to be working.

If anyone know the solution or having same issue, please share.