diff --git a/Dockerfile b/Dockerfile
index b4dd574..b97e9eb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,5 @@
-FROM base-firewall-1.8.7
-MAINTAINER gyurix
+FROM alpine
+
+RUN apk add --update --no-cache iptables iptables-legacy openssl jq curl ca-certificates busybox-extras
 COPY firewall/ /firewall/
 CMD firewall/iptables-wrapper-installer.sh && /firewall/firewall-add
diff --git a/firewall/firewall-add b/firewall/firewall-add
index 0f7b20b..950c2ee 100755
--- a/firewall/firewall-add
+++ b/firewall/firewall-add
@@ -347,7 +347,13 @@ echo 1 > /proc/sys/net/ipv4/ip_forward
 
 ##############################
 
-IPTABLES="/sbin/iptables"
+if /sbin/iptables-legacy -L  |grep DOCKER-USER ; then
+
+	IPTABLES="/sbin/iptables-legacy";
+else
+
+	IPTABLES="/sbin/iptables";
+fi
 
 ###############################