def on_message_update(self, event):
        try:
            msg = Message.get(id=event.id)
        except Message.DoesNotExist:
            self.log.warning('Not censoring MessageUpdate for id %s, %s, no stored message', event.channel_id, event.id)
            return

        if not event.content:
            return

        return self.on_message_create(
            event,
            author=event.guild.get_member(msg.author_id))