diff --git a/de/heat-templates/scripts/instance_boot.sh b/de/heat-templates/scripts/instance_boot.sh
index be762bf..6efe8ea 100644
--- a/de/heat-templates/scripts/instance_boot.sh
+++ b/de/heat-templates/scripts/instance_boot.sh
@@ -188,6 +188,7 @@
 function install_required_packages {
     # Disable unattended upgrades
     sed -i 's/1/0/' /etc/apt/apt.conf.d/20auto-upgrades
+    sed -i 's/APT::Periodic::Update-Package-Lists "1"/APT::Periodic::Update-Package-Lists "0"/g' /etc/apt/apt.conf.d/*
     local pkg_list="apt-transport-https ca-certificates curl software-properties-common jq unzip atop iptables-persistent socat ntp rng-tools open-iscsi"
 
     if [[ "${CONFIGURE_HUGE_PAGES}" == true ]]; then