diff --git a/packer/base-xubuntu-prepare-for-vagrant.sh b/packer/base-xubuntu-prepare-for-vagrant.sh
index 3dab689..4f1ce87 100644
--- a/packer/base-xubuntu-prepare-for-vagrant.sh
+++ b/packer/base-xubuntu-prepare-for-vagrant.sh
@@ -52,6 +52,7 @@ echo "root:root" | chpasswd
 
 #disable auto upgrades
 sed -i 's/APT::Periodic::Update-Package-Lists "1";/APT::Periodic::Update-Package-Lists "0";/' /etc/apt/apt.conf.d/20auto-upgrades
+sed -i 's/APT::Periodic::Unattended-Upgrade "1";/APT::Periodic::Unattended-Upgrade "0";/' /etc/apt/apt.conf.d/20auto-upgrades
 
 # In order to keep SSH speedy even when your machine or the Vagrant machine is not connected to the internet
 sed -i 's/#UseDNS no/UseDNS no/' /etc/ssh/sshd_config