diff --git a/docker/alpine/Dockerfile b/docker/alpine/Dockerfile
index f6e4b8f0..b964197f 100644
--- a/docker/alpine/Dockerfile
+++ b/docker/alpine/Dockerfile
@@ -5,7 +5,7 @@
 FROM alpine
 MAINTAINER kev <noreply@datageek.info>
 
-ENV SS_VER 2.4.4
+ENV SS_VER 2.4.5
 ENV SS_URL https://github.com/shadowsocks/shadowsocks-libev/archive/v$SS_VER.tar.gz
 ENV SS_DIR shadowsocks-libev-$SS_VER
 ENV SS_DEP autoconf build-base curl libtool linux-headers openssl-dev
@@ -29,6 +29,7 @@ ENV TIMEOUT     300
 ENV DNS_ADDR    8.8.8.8
 
 EXPOSE $SERVER_PORT
+EXPOSE $SERVER_PORT/udp
 
 CMD ss-server -s $SERVER_ADDR \
               -p $SERVER_PORT \
diff --git a/docker/alpine/docker-compose.yml b/docker/alpine/docker-compose.yml
index 19de6761..e545201b 100644
--- a/docker/alpine/docker-compose.yml
+++ b/docker/alpine/docker-compose.yml
@@ -1,7 +1,8 @@
 shadowsocks:
   image: shadowsocks-libev
   ports:
-    - "8388:8388"
+    - "8388:8388/tcp"
+    - "8388:8388/udp"
   environment:
     - METHOD=aes-256-cfb
     - PASSWORD=9MLSpPmNt
diff --git a/docker/ubuntu/Dockerfile b/docker/ubuntu/Dockerfile
index 913ec248..e7a03011 100644
--- a/docker/ubuntu/Dockerfile
+++ b/docker/ubuntu/Dockerfile
@@ -24,6 +24,7 @@ RUN rm -rf $BASEDIR/shadowsocks-libev\
 
 # Port in the config file won't take affect. Instead we'll use 8388.
 EXPOSE $PORT
+EXPOSE $SERVER_PORT/udp
 
 # Override the host and port in the config file.
 ADD entrypoint /