diff --git a/shadowsocks/libev/Dockerfile b/shadowsocks/libev/Dockerfile
index 6f2dd65..34538a5 100644
--- a/shadowsocks/libev/Dockerfile
+++ b/shadowsocks/libev/Dockerfile
@@ -5,7 +5,7 @@
 FROM alpine
 MAINTAINER kev <noreply@datageek.info>
 
-ENV SS_VER 2.3.0
+ENV SS_VER 2.3.1
 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