diff --git a/README.md b/README.md
index bb0adb5f..073f0858 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ It is a port of [shadowsocks](https://github.com/shadowsocks/shadowsocks)
 created by [@clowwindy](https://github.com/clowwindy) maintained by 
 [@madeye](https://github.com/madeye) and [@linusyang](https://github.com/linusyang).
 
-Current version: 2.4.0 | [Changelog](debian/changelog)
+Current version: 2.4.1 | [Changelog](debian/changelog)
 
 Travis CI: [![Travis CI](https://travis-ci.org/shadowsocks/shadowsocks-libev.png?branch=master)](https://travis-ci.org/shadowsocks/shadowsocks-libev) | Jenkins Matrix: [![Jenkins](https://jenkins.shadowvpn.org/buildStatus/icon?job=Shadowsocks-libev)](https://jenkins.shadowvpn.org/job/Shadowsocks-libev/)
 
diff --git a/configure b/configure
index 1026c4ea..2b2e450b 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for shadowsocks-libev 2.4.0.
+# Generated by GNU Autoconf 2.69 for shadowsocks-libev 2.4.1.
 #
 # Report bugs to <max.c.lv@gmail.com>.
 #
@@ -590,8 +590,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='shadowsocks-libev'
 PACKAGE_TARNAME='shadowsocks-libev'
-PACKAGE_VERSION='2.4.0'
-PACKAGE_STRING='shadowsocks-libev 2.4.0'
+PACKAGE_VERSION='2.4.1'
+PACKAGE_STRING='shadowsocks-libev 2.4.1'
 PACKAGE_BUGREPORT='max.c.lv@gmail.com'
 PACKAGE_URL=''
 
@@ -1346,7 +1346,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures shadowsocks-libev 2.4.0 to adapt to many kinds of systems.
+\`configure' configures shadowsocks-libev 2.4.1 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1417,7 +1417,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of shadowsocks-libev 2.4.0:";;
+     short | recursive ) echo "Configuration of shadowsocks-libev 2.4.1:";;
    esac
   cat <<\_ACEOF
 
@@ -1549,7 +1549,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-shadowsocks-libev configure 2.4.0
+shadowsocks-libev configure 2.4.1
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -2072,7 +2072,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by shadowsocks-libev $as_me 2.4.0, which was
+It was created by shadowsocks-libev $as_me 2.4.1, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -2893,7 +2893,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='shadowsocks-libev'
- VERSION='2.4.0'
+ VERSION='2.4.1'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -16098,7 +16098,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by shadowsocks-libev $as_me 2.4.0, which was
+This file was extended by shadowsocks-libev $as_me 2.4.1, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -16164,7 +16164,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-shadowsocks-libev config.status 2.4.0
+shadowsocks-libev config.status 2.4.1
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 
diff --git a/configure.ac b/configure.ac
index c7bac399..56bb3fd3 100755
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@ dnl                                               -*- Autoconf -*-
 dnl Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.67])
-AC_INIT([shadowsocks-libev], [2.4.0], [max.c.lv@gmail.com])
+AC_INIT([shadowsocks-libev], [2.4.1], [max.c.lv@gmail.com])
 AC_CONFIG_SRCDIR([src/encrypt.c])
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_AUX_DIR(auto)
diff --git a/debian/changelog b/debian/changelog
index 7d776f31..c973c4ec 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+shadowsocks-libev (2.4.1-1) unstable; urgency=high
+
+  * Fix a security bug.
+
+ -- Max Lv <max.c.lv@gmail.com>  Thu, 29 Oct 2015 15:42:47 +0900
+
 shadowsocks-libev (2.4.0-1) unstable; urgency=low
 
   * Update the one-time authentication
diff --git a/openwrt/Makefile b/openwrt/Makefile
index 3078d557..5d372f9a 100644
--- a/openwrt/Makefile
+++ b/openwrt/Makefile
@@ -1,7 +1,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=shadowsocks-libev
-PKG_VERSION:=2.4.0
+PKG_VERSION:=2.4.1
 PKG_RELEASE=$(PKG_SOURCE_VERSION)
 
 PKG_SOURCE_URL:=https://github.com/shadowsocks/shadowsocks-libev/archive