diff --git a/ShadowsocksX-NG/LaunchAgentUtils.swift b/ShadowsocksX-NG/LaunchAgentUtils.swift
index 9c0b258..428604a 100644
--- a/ShadowsocksX-NG/LaunchAgentUtils.swift
+++ b/ShadowsocksX-NG/LaunchAgentUtils.swift
@@ -49,7 +49,7 @@ func generateSSLocalLauchAgentPlist() -> Bool {
     let enableUdpRelay = defaults.bool(forKey: "LocalSocks5.EnableUDPRelay")
     let enableVerboseMode = defaults.bool(forKey: "LocalSocks5.EnableVerboseMode")
     
-    var arguments = [sslocalPath, "-c", "ss-local-config.json"]
+    var arguments = [sslocalPath, "-c", "ss-local-config.json", "--fast-open"]
     if enableUdpRelay {
         arguments.append("-u")
     }