diff --git a/debian/control b/debian/control
index 752385d..166bf43 100644
--- a/debian/control
+++ b/debian/control
@@ -3,8 +3,8 @@
 Priority: optional
 Maintainer: Coral <coral-support@google.com>
 Build-Depends: debhelper (>= 10),
-               linux-headers-4.19.32-mtk (>1),
-               linux-kbuild-4.19.32-mtk (>1)
+               linux-headers-4.4.22-mtk (>1),
+               linux-kbuild-4.4.22-mtk (>1)
 Standards-Version: 3.9.8
 Homepage: https://coral.withgoogle.com/
 
diff --git a/debian/postinst b/debian/postinst
index 096c772..05ae23c 100644
--- a/debian/postinst
+++ b/debian/postinst
@@ -2,4 +2,4 @@
 
 set -e
 
-depmod -a 4.19.32-mtk
+depmod -a 4.4.22-mtk
diff --git a/debian/rules b/debian/rules
index de5dad1..230887b 100755
--- a/debian/rules
+++ b/debian/rules
@@ -7,14 +7,14 @@
 PACKAGENAME=excelsior-wlan
 DESTDIR=$(shell pwd)/debian/$(PACKAGENAME)
 CURDIR=$(shell pwd)
-KERNELVERSION=4.19.32-mtk
+KERNELVERSION=4.4.22-mtk
 MODULESDIR=$(DESTDIR)/lib/modules/$(KERNELVERSION)
 CONNECTIVITYMODULESDIR=$(MODULESDIR)/kernel/misc/mediatek/connectivity
 
 KERNELSRC=/usr/src/linux-headers-$(KERNELVERSION)
 KERNELMOD=wlan_mt7668_sdio.ko
 
-
+LDFLAGS := -z relro
 
 
 MAKEOPTS := MTK_COMBO_CHIP=MT6632 \