diff --git a/post-debootstrap-installer.sh b/post-debootstrap-installer.sh
index 13c3450..54725d5 100755
--- a/post-debootstrap-installer.sh
+++ b/post-debootstrap-installer.sh
@@ -37,11 +37,9 @@ cat /hardware-setup/authorized_keys/* > /etc/dropbear-initramfs/authorized_keys
 # install grub
 if [ -d /sys/firmware/efi ]; then
     apt-get -y install grub-efi-amd64
-    update-grub
     grub-install
 else
     apt-get -y install grub-pc
-    update-grub
 
     root_disk="/dev/$(lsblk -no pkname $(cryptsetup status root-unlocked | grep device | perl -pe 's#.*device.* (.*)#$1#') | sort | head -n1)"
     grub-install "$root_disk"