diff --git a/post-debootstrap-installer.sh b/post-debootstrap-installer.sh
index 5df17bc..d00d8da 100755
--- a/post-debootstrap-installer.sh
+++ b/post-debootstrap-installer.sh
@@ -40,7 +40,7 @@ apt-get -y install linux-image-amd64
 # install grub
 apt-get -y install grub-efi-amd64
 update-grub
-grub-install
+grub-install --target=x86_64-efi --efi-directory=/boot/efi/ --bootloader-id=GRUB
 
 # edit uuids in fstab
 root_uuid=$(blkid --output value "/dev/mapper/root-unlocked" | head -n1)