diff --git a/debian12/packer.pkr.hcl b/debian12/packer.pkr.hcl
index eb8fa90..968380d 100644
--- a/debian12/packer.pkr.hcl
+++ b/debian12/packer.pkr.hcl
@@ -98,6 +98,7 @@ source "proxmox-iso" "template" {
     format            = "${var.proxmox_storage_format}"
     storage_pool      = "${var.proxmox_storage_pool}"
     type              = "virtio"
+    cache_mode        = "unsafe"
   }
 
   # networking
diff --git a/scripts/ubuntu24.sh b/scripts/ubuntu24.sh
index f096d18..7005f79 100644
--- a/scripts/ubuntu24.sh
+++ b/scripts/ubuntu24.sh
@@ -2,9 +2,9 @@
 
 # update the guest
 echo '> Updating the guest ...'
-sudo -u root apt update
-sudo -u root DEBIAN_FRONTEND=noninteractive apt -y upgrade
-sudo -u root apt autoremove -y
+sudo -u root apt-get update
+sudo -u root DEBIAN_FRONTEND=noninteractive apt-get -y upgrade
+sudo -u root apt-get autoremove -y
 
 # install rc.local script
 cat << 'EOL' | sudo tee /etc/rc.local
@@ -53,7 +53,7 @@ sudo -u root hostnamectl set-hostname localhost
 
 # cleans apt.
 echo '> cleaning apt-get ...'
-sudo -u root apt clean
+sudo -u root apt-get clean
 
 # cleans the machine-id
 echo '> cleaning the machine-id ...'
diff --git a/ubuntu24/packer.pkr.hcl b/ubuntu24/packer.pkr.hcl
index 4800636..4635f98 100644
--- a/ubuntu24/packer.pkr.hcl
+++ b/ubuntu24/packer.pkr.hcl
@@ -98,6 +98,7 @@ source "proxmox-iso" "template" {
     format            = "${var.proxmox_storage_format}"
     storage_pool      = "${var.proxmox_storage_pool}"
     type              = "virtio"
+    cache_mode        = "unsafe"
   }
 
   # networking