diff --git a/docker/l2tp/Dockerfile b/docker/l2tp/Dockerfile
index b4b9b07..025eac3 100644
--- a/docker/l2tp/Dockerfile
+++ b/docker/l2tp/Dockerfile
@@ -1,5 +1,5 @@
 # Dockerfile for L2TP/IPSec VPN Server
-# Copyright (C) 2018 Teddysun <i@teddysun.com>
+# Copyright (C) 2018 - 2019 Teddysun <i@teddysun.com>
 
 FROM debian:stretch
 LABEL maintainer="Teddysun <i@teddysun.com>"
diff --git a/docker/l2tp/alpine/Dockerfile b/docker/l2tp/alpine/Dockerfile
index 17f5395..ce8b1fa 100644
--- a/docker/l2tp/alpine/Dockerfile
+++ b/docker/l2tp/alpine/Dockerfile
@@ -1,5 +1,5 @@
 # Dockerfile for L2TP/IPSec VPN Server based alpine
-# Copyright (C) 2019 Teddysun <i@teddysun.com>
+# Copyright (C) 2018 - 2019 Teddysun <i@teddysun.com>
 
 FROM alpine:edge
 LABEL maintainer="Teddysun <i@teddysun.com>"