diff --git a/tools/appliance/definitions/systemvm64template/postinstall.sh b/tools/appliance/definitions/systemvm64template/postinstall.sh
index a4d3cbeccb4..064a2226d06 100644
--- a/tools/appliance/definitions/systemvm64template/postinstall.sh
+++ b/tools/appliance/definitions/systemvm64template/postinstall.sh
@@ -31,6 +31,8 @@ install_packages() {
   DEBIAN_FRONTEND=noninteractive
   DEBIAN_PRIORITY=critical
 
+  DEBIAN_FRONTEND=noninteractive apt-get --no-install-recommends -qq -y --force-yes upgrade
+
   # Basic packages
   apt-get --no-install-recommends -q -y --force-yes install rsyslog logrotate cron chkconfig insserv net-tools ifupdown vim-tiny netbase iptables
   apt-get --no-install-recommends -q -y --force-yes install openssh-server openssl e2fsprogs dhcp3-client tcpdump socat wget
diff --git a/tools/appliance/definitions/systemvmtemplate/postinstall.sh b/tools/appliance/definitions/systemvmtemplate/postinstall.sh
index b59d3aaf731..5370849a6d9 100644
--- a/tools/appliance/definitions/systemvmtemplate/postinstall.sh
+++ b/tools/appliance/definitions/systemvmtemplate/postinstall.sh
@@ -31,6 +31,8 @@ install_packages() {
   DEBIAN_FRONTEND=noninteractive
   DEBIAN_PRIORITY=critical
 
+  DEBIAN_FRONTEND=noninteractive apt-get --no-install-recommends -qq -y --force-yes upgrade
+
   # Basic packages
   apt-get --no-install-recommends -q -y --force-yes install rsyslog logrotate cron chkconfig insserv net-tools ifupdown vim-tiny netbase iptables
   apt-get --no-install-recommends -q -y --force-yes install openssh-server openssl e2fsprogs dhcp3-client tcpdump socat wget