diff --git a/configure b/configure
index 2663682a..dcf996b1 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 1.4.8.
+# Generated by GNU Autoconf 2.69 for shadowsocks 1.4.9.
 #
 # Report bugs to <max.c.lv@gmail.com>.
 #
@@ -590,8 +590,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='shadowsocks'
 PACKAGE_TARNAME='shadowsocks'
-PACKAGE_VERSION='1.4.8'
-PACKAGE_STRING='shadowsocks 1.4.8'
+PACKAGE_VERSION='1.4.9'
+PACKAGE_STRING='shadowsocks 1.4.9'
 PACKAGE_BUGREPORT='max.c.lv@gmail.com'
 PACKAGE_URL=''
 
@@ -1328,7 +1328,7 @@ 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 1.4.8 to adapt to many kinds of systems.
+\`configure' configures shadowsocks 1.4.9 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1398,7 +1398,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of shadowsocks 1.4.8:";;
+     short | recursive ) echo "Configuration of shadowsocks 1.4.9:";;
    esac
   cat <<\_ACEOF
 
@@ -1516,7 +1516,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-shadowsocks configure 1.4.8
+shadowsocks configure 1.4.9
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -2039,7 +2039,7 @@ 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 $as_me 1.4.8, which was
+It was created by shadowsocks $as_me 1.4.9, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -2860,7 +2860,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='shadowsocks'
- VERSION='1.4.8'
+ VERSION='1.4.9'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -15547,7 +15547,7 @@ 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 $as_me 1.4.8, which was
+This file was extended by shadowsocks $as_me 1.4.9, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -15613,7 +15613,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-shadowsocks config.status 1.4.8
+shadowsocks config.status 1.4.9
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 
diff --git a/configure.ac b/configure.ac
index 265fb89d..fa6d05ef 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], [1.4.8], [max.c.lv@gmail.com])
+AC_INIT([shadowsocks], [1.4.9], [max.c.lv@gmail.com])
 AC_CONFIG_SRCDIR([src/encrypt.c])
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_AUX_DIR(auto)
diff --git a/src/jconf.h b/src/jconf.h
index 12ab62c1..52a5d58b 100644
--- a/src/jconf.h
+++ b/src/jconf.h
@@ -25,7 +25,6 @@
 #define MAX_REMOTE_NUM 10
 #define MAX_CONF_SIZE 16 * 1024
 #define DNS_THREAD_NUM 4
-#define MAX_UDP_CONN_NUM 4096
 
 typedef struct
 {
diff --git a/src/udprelay.c b/src/udprelay.c
index 4b176b30..271952dd 100644
--- a/src/udprelay.c
+++ b/src/udprelay.c
@@ -57,6 +57,12 @@
 #include "udprelay.h"
 #include "cache.h"
 
+#ifdef UDPRELAY_REMOTE
+#define MAX_UDP_CONN_NUM 1024
+#else
+#define MAX_UDP_CONN_NUM 256
+#endif
+
 #ifdef UDPRELAY_REMOTE
 #ifdef UDPRELAY_LOCAL
 #error "UDPRELAY_REMOTE and UDPRELAY_LOCAL should not be both defined"