diff --git a/api/controller/System.go b/api/controller/System.go
index 3bff2a4..031d543 100644
--- a/api/controller/System.go
+++ b/api/controller/System.go
@@ -137,6 +137,10 @@ func (b *System) PutSystemTime(c *gin.Context) {
 			return
 		}
 
+		if duration > 5*time.Minute {
+			duration = 5 * time.Minute
+		}
+
 		// 添加缓存
 		_, err = global.Redis.Set(c, redisKey, "1", duration).Result()
 		if err != nil {