diff --git a/required_pkgs.sh b/required_pkgs.sh
index 93b9164..505204b 100755
--- a/required_pkgs.sh
+++ b/required_pkgs.sh
@@ -1,4 +1,4 @@
 #!/bin/bash
-REQD_PKGS="grub-efi-ia32-bin grub-efi-amd64-bin grub-pc-bin grub2-common grub-common util-linux parted gdisk mount xorriso genisoimage squashfs-tools rsync git build-essential kernel-package fakeroot libncurses5-dev libssl-dev ccache libfile-fcntllock-perl curl python-pexpect libelf-dev"
+REQD_PKGS="grub-efi-ia32-bin grub-efi-amd64-bin grub-pc-bin grub2-common grub-common util-linux parted gdisk mount xorriso genisoimage squashfs-tools rsync git build-essential kernel-package fakeroot libncurses5-dev libssl-dev ccache libfile-fcntllock-perl curl python-pexpect libelf-dev bison"
 
 $(dirname $0)/pkgs_missing_from.sh $REQD_PKGS