Widget attributes in ModelForm

My widget attribute settings  aren't having any effect in the render template.  

View:

class DvBooleanCreateView(CreateView):

    template_name = 'dvboolean_create.html'

    success_url = '/dashboard'

    model = DvBoolean

    form = DvBooleanCreateForm

    fields = ['prj_name','data_name','lang','valid_trues','valid_falses','description','sem_attr','resource_uri','asserts',]

Form:

class DvBooleanCreateForm(ModelForm):

    class Meta:

        model = DvBoolean      

        #fields = ['prj_name','data_name','lang','valid_trues','valid_falses','description','sem_attr','resource_uri','asserts',]

        widgets = {

                    'description': Textarea(attrs={'cols':40, 'rows':3}),

                   }

The form as displayed in the browser has the default size with or without the widgets settings in the ModelForm.

What am I missing?

Thanks,

Tim

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