diff --git a/docker/shadowsocks-libev/Dockerfile b/docker/shadowsocks-libev/Dockerfile
index 4b0b0a9..159dd31 100644
--- a/docker/shadowsocks-libev/Dockerfile
+++ b/docker/shadowsocks-libev/Dockerfile
@@ -7,10 +7,10 @@ FROM debian:stretch
 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 \
-    && apt-get update \
-    && apt-get -t stretch-backports install -y --no-install-recommends shadowsocks-libev simple-obfs \
-    && rm -rf /var/lib/apt/lists/*
+	&& printf "deb http://deb.debian.org/debian stretch-backports main" > /etc/apt/sources.list.d/stretch-backports.list \
+	&& apt-get update \
+	&& apt-get -t stretch-backports install -y --no-install-recommends shadowsocks-libev simple-obfs \
+	&& rm -rf /var/lib/apt/lists/*
 
 COPY ./config_sample.json /etc/shadowsocks-libev/config.json
 VOLUME /etc/shadowsocks-libev
diff --git a/docker/shadowsocks-libev/alpine/Dockerfile b/docker/shadowsocks-libev/alpine/Dockerfile
index b5b01ac..8e630c7 100644
--- a/docker/shadowsocks-libev/alpine/Dockerfile
+++ b/docker/shadowsocks-libev/alpine/Dockerfile
@@ -10,46 +10,44 @@ ENV LIBEV_VER 3.2.0
 ENV LIBEV_NAME shadowsocks-libev-${LIBEV_VER}
 ENV LIBEV_RELEASE https://github.com/shadowsocks/shadowsocks-libev/releases/download/v${LIBEV_VER}/${LIBEV_NAME}.tar.gz
 
-RUN set -ex \
-    && runDeps=' \
-       tar \
-       git \
-       wget \
-       build-base \
-       c-ares-dev \
-       autoconf \
-       automake \
-       libev-dev \
-       libtool \
-       libsodium-dev \
-       linux-headers \
-       mbedtls-dev \
-       pcre-dev \
-       ' \
-    && apk add --no-cache --virtual .build-deps \
-       ${runDeps} \
-    && mkdir -p /tmp/libev \
-    && cd /tmp/libev \
-    && git clone --depth=1 https://github.com/shadowsocks/simple-obfs.git . \
-    && git submodule update --init --recursive \
-    && ./autogen.sh \
-    && ./configure --prefix=/usr --disable-documentation \
-    && make install \
-    && rm -rf * \
-    && wget -qO ${LIBEV_NAME}.tar.gz ${LIBEV_RELEASE} \
-    && tar zxf ${LIBEV_NAME}.tar.gz \
-    && cd ${LIBEV_NAME} \
-    && ./configure --prefix=/usr --disable-documentation \
-    && make install \
-    && apk add --no-cache \
-       rng-tools \
-       $(scanelf --needed --nobanner /usr/bin/ss-* \
-      | awk '{ gsub(/,/, "\nso:", $2); print "so:" $2 }' \
-      | xargs -r apk info --installed \
-      | sort -u) \
-    && apk del .build-deps \
-    && cd /tmp \
-    && rm -rf /tmp/libev \
+RUN runDeps="\
+		tar \
+		git \
+		wget \
+		build-base \
+		c-ares-dev \
+		autoconf \
+		automake \
+		libev-dev \
+		libtool \
+		libsodium-dev \
+		linux-headers \
+		mbedtls-dev \
+		pcre-dev \
+	"; \
+	set -ex \
+	&& apk add --no-cache --virtual .build-deps ${runDeps} \
+	&& mkdir -p /tmp/libev \
+	&& cd /tmp/libev \
+	&& git clone --depth=1 https://github.com/shadowsocks/simple-obfs.git . \
+	&& git submodule update --init --recursive \
+	&& ./autogen.sh \
+	&& ./configure --prefix=/usr --disable-documentation \
+	&& make install \
+	&& rm -rf * \
+	&& wget -qO ${LIBEV_NAME}.tar.gz ${LIBEV_RELEASE} \
+	&& tar zxf ${LIBEV_NAME}.tar.gz \
+	&& cd ${LIBEV_NAME} \
+	&& ./configure --prefix=/usr --disable-documentation \
+	&& make install \
+	&& apk add --no-cache rng-tools \
+		$(scanelf --needed --nobanner /usr/bin/ss-* \
+		| awk '{ gsub(/,/, "\nso:", $2); print "so:" $2 }' \
+		| xargs -r apk info --installed \
+		| sort -u) \
+	&& apk del .build-deps \
+	&& cd /tmp \
+	&& rm -rf /tmp/libev
 
 COPY ./config_sample.json /etc/shadowsocks-libev/config.json
 VOLUME /etc/shadowsocks-libev
diff --git a/docker/shadowsocks-r/Dockerfile b/docker/shadowsocks-r/Dockerfile
index 912b78d..81c9eba 100644
--- a/docker/shadowsocks-r/Dockerfile
+++ b/docker/shadowsocks-r/Dockerfile
@@ -7,14 +7,14 @@ FROM debian:stretch
 LABEL maintainer="Teddysun <i@teddysun.com>"
 
 RUN set -ex \
-    && apt-get update \
-    && apt-get install -y wget python libsodium-dev openssl \
-    && rm -rf /var/lib/apt/lists/* \
-    && wget -O /tmp/shadowsocksr-3.2.2.tar.gz https://github.com/shadowsocksrr/shadowsocksr/archive/3.2.2.tar.gz \
-    && tar zxf /tmp/shadowsocksr-3.2.2.tar.gz -C /tmp \
-    && mv /tmp/shadowsocksr-3.2.2/shadowsocks /usr/local/ \
-    && rm -fr /tmp/shadowsocksr-3.2.2 \
-    && rm -f /tmp/shadowsocksr-3.2.2.tar.gz
+	&& apt-get update \
+	&& apt-get install -y wget python libsodium-dev openssl \
+	&& rm -rf /var/lib/apt/lists/* \
+	&& wget -O /tmp/shadowsocksr-3.2.2.tar.gz https://github.com/shadowsocksrr/shadowsocksr/archive/3.2.2.tar.gz \
+	&& tar zxf /tmp/shadowsocksr-3.2.2.tar.gz -C /tmp \
+	&& mv /tmp/shadowsocksr-3.2.2/shadowsocks /usr/local/ \
+	&& rm -fr /tmp/shadowsocksr-3.2.2 \
+	&& rm -f /tmp/shadowsocksr-3.2.2.tar.gz
 
 COPY ./config_sample.json /etc/shadowsocks-r/config.json
 VOLUME /etc/shadowsocks-r