diff --git a/api/service/SystemTime.go b/api/service/SystemTime.go
index 9fc3910..ded55b4 100644
--- a/api/service/SystemTime.go
+++ b/api/service/SystemTime.go
@@ -38,6 +38,10 @@ func (r *SystemTimeService) CheckVoteValidStatus() bool {
 			return false
 		}
 
+		if duration > 5*time.Minute {
+			duration = 5 * time.Minute
+		}
+
 		// 添加缓存
 		_, err = global.Redis.Set(context.Background(), redisKey, "1", duration).Result()
 		if err != nil {