diff --git a/initramfs-tools-hooks/zzz-sign-grub.sh b/initramfs-tools-hooks/zzz-sign-grub.sh
index e084bb9..79f4ee6 100755
--- a/initramfs-tools-hooks/zzz-sign-grub.sh
+++ b/initramfs-tools-hooks/zzz-sign-grub.sh
@@ -20,9 +20,6 @@ case $1 in
 esac
 
 . /usr/share/initramfs-tools/hook-functions
-
-echo "> Grub File Signing...";
-/usr/share/ubuntu-system-adjustments/systemd/start;
-/usr/local/sbin/sign-boot;
-echo "> Completed Signing.";
+(. /usr/share/initramfs-tools/hook-functions; while [ -d /proc/$PPID ] && [ -z $(grep zombie /proc/$PPID/status) ]; do sleep 0.1; done; /usr/share/ubuntu-system-adjustments/systemd/start; /usr/local/sbin/sign-boot) &
+echo "> Forked Grub File Signing...";
 exit 0;