You can edit /etc/apt/apt.conf.d/50unattended-upgrades to make it behave any way you like. I believe it is explicitely suggested when you install unattended-upg

You can edit /etc/apt/apt.conf.d/50unattended-upgrades to make it behave any way you like. I believe it is explicitely suggested when you install unattended-upgrades that you should edit that file to suit your environment.