diff --git a/shadowsocks-libev/files/shadowsocks.conf b/shadowsocks-libev/files/shadowsocks.conf
index d0951f43c..a2bbbb9bb 100644
--- a/shadowsocks-libev/files/shadowsocks.conf
+++ b/shadowsocks-libev/files/shadowsocks.conf
@@ -2,9 +2,10 @@
 # max open files
 fs.file-max = 512000
 # max read buffer
-net.core.rmem_max = 134217728
+net.core.rmem_max = 524287
 # max write buffer
-net.core.wmem_max = 134217728
+net.core.wmem_max = 524287
+net.core.optmem_max = 524287
 # default read buffer
 net.core.rmem_default = 32768
 # default write buffer
@@ -33,13 +34,13 @@ net.ipv4.tcp_max_tw_buckets = 10000
 # turn on TCP Fast Open on both client and server side
 #net.ipv4.tcp_fastopen = 3
 # TCP receive buffer
-net.ipv4.tcp_rmem = 4096 87380 134217728
+net.ipv4.tcp_rmem = 4096 524288 204217728
 # TCP write buffer
-net.ipv4.tcp_wmem = 4096 65536 134217728
+net.ipv4.tcp_wmem = 4096 524288 204217728
 # TCP buffer
-net.ipv4.tcp_mem = 134217728 134217728 134217728
+net.ipv4.tcp_mem = 768174 10242330 15363480
 # UDP buffer
-net.ipv4.udp_mem = 134217728 134217728 134217728
+net.ipv4.udp_mem = 768174 10242330 15363480
 # turn off path MTU discovery
 net.ipv4.tcp_mtu_probing = 0