diff --git a/ShadowsocksX-NG/LaunchAgentUtils.swift b/ShadowsocksX-NG/LaunchAgentUtils.swift
index 7314e71..9e7dfba 100644
--- a/ShadowsocksX-NG/LaunchAgentUtils.swift
+++ b/ShadowsocksX-NG/LaunchAgentUtils.swift
@@ -151,7 +151,9 @@ func SyncSSLocal() {
     changed = changed || generateSSLocalLauchAgentPlist()
     let mgr = ServerProfileManager.instance
     if mgr.activeProfileId != nil {
-        changed = changed || writeSSLocalConfFile((mgr.getActiveProfile()?.toJsonConfig())!)
+        if let profile = mgr.getActiveProfile() {
+            changed = changed || writeSSLocalConfFile((profile.toJsonConfig()))
+        }
         
         let on = UserDefaults.standard.bool(forKey: "ShadowsocksOn")
         if on {