diff --git a/Makefile b/Makefile
index 841d486..3e6dcd5 100644
--- a/Makefile
+++ b/Makefile
@@ -20,8 +20,8 @@
 ifndef KBUILD_OUTPUT
 KBUILD_OUTPUT="/lib/modules/$(shell uname -r)/build"
 endif
-IPTABLES_VERSION:=1.3.8
-OLD_IPTABLES_VERSION:=1.3.7
+IPTABLES_VERSION:=1.4.0rc1
+OLD_IPTABLES_VERSION:=1.3.8
 
 PREFIX:=/usr/local
 LIBDIR:=$(PREFIX)/lib