diff --git a/docker/shadowsocks-libev/Dockerfile b/docker/shadowsocks-libev/Dockerfile
index bda6660..4b0b0a9 100644
--- a/docker/shadowsocks-libev/Dockerfile
+++ b/docker/shadowsocks-libev/Dockerfile
@@ -4,7 +4,7 @@
 # https://github.com/shadowsocks/shadowsocks-libev
 
 FROM debian:stretch
-MAINTAINER Teddysun <i@teddysun.com>
+LABEL maintainer="Teddysun <i@teddysun.com>"
 
 RUN set -ex \
     && printf "deb http://deb.debian.org/debian stretch-backports main" > /etc/apt/sources.list.d/stretch-backports.list \
@@ -17,4 +17,4 @@ VOLUME /etc/shadowsocks-libev
 
 USER nobody
 
-CMD [ "/bin/bash", "-c", "/usr/bin/ss-server -c /etc/shadowsocks-libev/config.json" ]
+CMD [ "ss-server", "-c", "/etc/shadowsocks-libev/config.json" ]
diff --git a/docker/shadowsocks-r/Dockerfile b/docker/shadowsocks-r/Dockerfile
index f688544..912b78d 100644
--- a/docker/shadowsocks-r/Dockerfile
+++ b/docker/shadowsocks-r/Dockerfile
@@ -4,7 +4,7 @@
 # https://github.com/shadowsocksrr/shadowsocksr
 
 FROM debian:stretch
-MAINTAINER Teddysun <i@teddysun.com>
+LABEL maintainer="Teddysun <i@teddysun.com>"
 
 RUN set -ex \
     && apt-get update \
@@ -21,4 +21,4 @@ VOLUME /etc/shadowsocks-r
 
 USER nobody
 
-CMD [ "/bin/bash", "-c", "/usr/local/shadowsocks/server.py -c /etc/shadowsocks-r/config.json" ]
+CMD [ "/usr/local/shadowsocks/server.py", "-c", "/etc/shadowsocks-r/config.json" ]