diff --git a/config/settings.go b/config/settings.go
index ccd4124..a46dd93 100644
--- a/config/settings.go
+++ b/config/settings.go
@@ -33,6 +33,7 @@ type ServiceSetting struct {
 	MaxSessionLife time.Duration
 	ItemsPageSize  int
 	CacheLifeTime  time.Duration
+	HostSerial     int64
 }
 
 // 定义全局变量
diff --git a/settings.yaml b/settings.yaml
index f926f74..4a0e548 100644
--- a/settings.yaml
+++ b/settings.yaml
@@ -19,4 +19,5 @@ Redis:
 Service:
   MaxSessionLife: 2h
   ItemsPageSize: 20
-  CacheLifeTime: 5m
\ No newline at end of file
+  CacheLifeTime: 5m
+  HostSerial: 5