diff --git a/openmptcprouter/files/etc/uci-defaults/1930-omr-shadowsocks b/openmptcprouter/files/etc/uci-defaults/1930-omr-shadowsocks
index 1c339219b..437ede096 100755
--- a/openmptcprouter/files/etc/uci-defaults/1930-omr-shadowsocks
+++ b/openmptcprouter/files/etc/uci-defaults/1930-omr-shadowsocks
@@ -120,8 +120,10 @@ if [ -z "$(uci -q get shadowsocks-rust.hi1.keep_alive)" ]; then
 	uci -q batch <<-EOF > /dev/null
 		set shadowsocks-rust.hi1.keep_alive=15
 		set shadowsocks-rust.hi1.no_delay=1
+		set shadowsocks-rust.hi1.fast_open=1
 		set shadowsocks-rust.hi2.keep_alive=15
 		set shadowsocks-rust.hi2.no_delay=1
+		set shadowsocks-rust.hi2.fast_open=1
 		commit shadowsocks-rust
 	EOF
 fi
diff --git a/shadowsocks-rust/files/shadowsocks-rust.config b/shadowsocks-rust/files/shadowsocks-rust.config
index c12db84c6..498783762 100644
--- a/shadowsocks-rust/files/shadowsocks-rust.config
+++ b/shadowsocks-rust/files/shadowsocks-rust.config
@@ -5,7 +5,7 @@ config ss_redir hi1
 	option mode 'tcp_and_udp'
 	option timeout '1000'
 	option keep_alive '15'
-	option fast_open 0
+	option fast_open 1
 	option verbose 0
 	option syslog 1
 	option reuse_port 0
@@ -20,7 +20,7 @@ config ss_redir hi2
 	option mode 'tcp_and_udp'
 	option timeout '1000'
 	option keep_alive '15'
-	option fast_open 0
+	option fast_open 1
 	option verbose 0
 	option syslog 1
 	option reuse_port 0