diff --git a/proxmox/templates/config/buster-preseed.cfg b/proxmox/templates/config/buster-preseed.cfg
--- a/proxmox/templates/config/buster-preseed.cfg
+++ b/proxmox/templates/config/buster-preseed.cfg
@@ -293,7 +293,7 @@
 apparmor	apparmor/homedirs	string
 # GRUB install devices:
 # Choices: /dev/sda (21474 MB; VBOX_HARDDISK), - /dev/sda1 (254 MB; /boot), /dev/mapper/vagrant--template--vg-root (3976 MB; vagrant--template--vg-root)
-grub-pc	grub-pc/install_devices	multiselect	/dev/sda
+grub-pc	grub-pc/install_devices	multiselect	/dev/vda
 # for internal use
 d-i	keyboard-configuration/optionscode	string
 keyboard-configuration	keyboard-configuration/optionscode	string
diff --git a/proxmox/templates/debian_buster.json b/proxmox/templates/debian_buster.json
--- a/proxmox/templates/debian_buster.json
+++ b/proxmox/templates/debian_buster.json
@@ -22,8 +22,9 @@
       "username": "{{ user `username` }}",
       "password": "{{ user `password` }}",
       "node": "{{ user `proxmox_node` }}",
-      "vm_id": 10001,
+      "vm_id": 10003,
       "memory": 1024,
+      "sockets": "1",
       "cores": 2,
       "network_adapters": [
         {
@@ -31,9 +32,10 @@
           "model": "virtio"
         }
       ],
+      "scsi_controller": "virtio-scsi-pci",
       "disks": [
         {
-          "type": "scsi",
+          "type": "virtio",
           "disk_size": "20G",
           "storage_pool": "proxmox",
           "storage_pool_type": "cephfs"
@@ -41,6 +43,7 @@
       ],
       "qemu_agent": "true",
       "cloud_init": "true",
+      "cloud_init_storage_pool": "proxmox",
 
       "iso_url": "https://cdimage.debian.org/debian-cd/current/amd64/iso-cd/debian-10.6.0-amd64-netinst.iso",
       "iso_checksum": "2af8f43d4a7ab852151a7f630ba596572213e17d3579400b5648eba4cc974ed0",
@@ -73,7 +76,7 @@
           "DEBCONF_DEBUG=5 <wait>",
           "console-setup/ask_detect=false <wait>",
           "console-keymaps-at/keymap=us <wait>",
-          "grub-installer/bootdev=/dev/sda <wait>",
+          "grub-installer/bootdev=/dev/vda <wait>",
           "<enter><wait>"
       ],
       
@@ -106,7 +109,7 @@
     },
     {
       "type": "shell",
-      "expect_disconnect": "true",
+      "expect_disconnect": "false",
       "execute_command": "echo 'installer'|{{.Vars}} sudo -S -E bash '{{.Path}}'",
       "scripts": [
         "scripts/cleanup.sh"
diff --git a/proxmox/templates/scripts/proxmox.sh b/proxmox/templates/scripts/proxmox.sh
--- a/proxmox/templates/scripts/proxmox.sh
+++ b/proxmox/templates/scripts/proxmox.sh
@@ -1,7 +1,6 @@
 #!/bin/bash -eu
 
-
-apt-get install -y cloud-init qemu qemu-guest-agent
+DEBIAN_FRONTEND=noninteractive apt-get install -y cloud-init qemu qemu-guest-agent
 
 # Update grub for a faster boot
 sed -i s'/GRUB_TIMEOUT = 5/GRUB_TIMEOUT = 0/' /etc/default/grub