Django: how to make case-insensitive __in query

views.py

    def get_queryset(self):
        queryset = super(MyModel, self).get_queryset()
        states_filter = [
            item.strip()
            for item in config.STATES.split(',')
        ]
        if not states_filter:
            MyModel.objects.none()
        q = Q()
        for state in states_filter:
            q = q | Q(status__iexact=state)
        queryset = queryset.filter(q)
        return queryset