How to prevent downloaded files from being opened in the browser?

Question

Django

There is a view that returns a file:

def dowlnd(request, doc_id):

    doc_f = Document.objects.get(id=doc_id).file

    response = HttpResponse(doc_f)
    response['Content-Disposition'] = 'attachment; filename='+doc_f.name

    return response

When I link dowlnd/<doc_id>/, I get a file. The image format is downloaded normally, that is, it is immediately saved by the browser to the download folder. But the docx format, the browser tries to open in a new window. As always, should I download any file format so that the browser does not try to open it?