diff --git a/docker/shadowsocks-go/Dockerfile b/docker/shadowsocks-go/Dockerfile
index e02566f..b494b01 100644
--- a/docker/shadowsocks-go/Dockerfile
+++ b/docker/shadowsocks-go/Dockerfile
@@ -1,5 +1,5 @@
 # Dockerfile for Shadowsocks-go based alpine
-# Copyright (C) 2018 Teddysun <i@teddysun.com>
+# Copyright (C) 2018 - 2019 Teddysun <i@teddysun.com>
 # Reference URL:
 # https://github.com/shadowsocks/shadowsocks-go
 
diff --git a/docker/shadowsocks-libev/Dockerfile b/docker/shadowsocks-libev/Dockerfile
index 4c4e4da..846768f 100644
--- a/docker/shadowsocks-libev/Dockerfile
+++ b/docker/shadowsocks-libev/Dockerfile
@@ -1,5 +1,5 @@
 # Dockerfile for shadowsocks-libev
-# Copyright (C) 2018 Teddysun <i@teddysun.com>
+# Copyright (C) 2018 - 2019 Teddysun <i@teddysun.com>
 # Reference URL:
 # https://github.com/shadowsocks/shadowsocks-libev
 
diff --git a/docker/shadowsocks-libev/alpine/Dockerfile b/docker/shadowsocks-libev/alpine/Dockerfile
index f85c7d4..36f85de 100644
--- a/docker/shadowsocks-libev/alpine/Dockerfile
+++ b/docker/shadowsocks-libev/alpine/Dockerfile
@@ -1,5 +1,5 @@
 # Dockerfile for shadowsocks-libev based alpine
-# Copyright (C) 2018 Teddysun <i@teddysun.com>
+# Copyright (C) 2018 - 2019 Teddysun <i@teddysun.com>
 # Reference URL:
 # https://github.com/shadowsocks/shadowsocks-libev
 
diff --git a/docker/shadowsocks-python/Dockerfile b/docker/shadowsocks-python/Dockerfile
index 17a2ed4..187f488 100644
--- a/docker/shadowsocks-python/Dockerfile
+++ b/docker/shadowsocks-python/Dockerfile
@@ -1,5 +1,5 @@
 # Dockerfile for Shadowsocks-Python based alpine
-# Copyright (C) 2018 Teddysun <i@teddysun.com>
+# Copyright (C) 2018 - 2019 Teddysun <i@teddysun.com>
 # Reference URL:
 # https://github.com/shadowsocks/shadowsocks/tree/master
 
diff --git a/docker/shadowsocks-r/Dockerfile b/docker/shadowsocks-r/Dockerfile
index 81c9eba..f67038c 100644
--- a/docker/shadowsocks-r/Dockerfile
+++ b/docker/shadowsocks-r/Dockerfile
@@ -1,5 +1,5 @@
 # Dockerfile for ShadowsocksR
-# Copyright (C) 2018 Teddysun <i@teddysun.com>
+# Copyright (C) 2018 - 2019 Teddysun <i@teddysun.com>
 # Reference URL:
 # https://github.com/shadowsocksrr/shadowsocksr
 
diff --git a/docker/shadowsocks-r/alpine/Dockerfile b/docker/shadowsocks-r/alpine/Dockerfile
index ace936a..238c0be 100644
--- a/docker/shadowsocks-r/alpine/Dockerfile
+++ b/docker/shadowsocks-r/alpine/Dockerfile
@@ -1,5 +1,5 @@
 # Dockerfile for ShadowsocksR based alpine
-# Copyright (C) 2018 Teddysun <i@teddysun.com>
+# Copyright (C) 2018 - 2019 Teddysun <i@teddysun.com>
 # Reference URL:
 # https://github.com/shadowsocksrr/shadowsocksr