diff --git a/server/cron_server/ssl_update.go b/server/cron_server/ssl_update.go
index d6a2868d..f4de1281 100644
--- a/server/cron_server/ssl_update.go
+++ b/server/cron_server/ssl_update.go
@@ -10,7 +10,7 @@ import (
 
 func Start() {
 	for {
-		if config.Instance.IsInit {
+		if config.Instance != nil && config.Instance.IsInit {
 			days, err := ssl.CheckSSLCrtInfo()
 			if days < 30 || err != nil {
 				if err != nil {