diff --git a/storage/minio.go b/storage/minio.go
index e008eda..df822b8 100644
--- a/storage/minio.go
+++ b/storage/minio.go
@@ -113,7 +113,7 @@ func (s *Minio) Url(objectName string, expire time.Duration) string {
 		return err.Error()
 	}
 
-	if expire > time.Hour*24*7 {
+	if expire > time.Hour*24*7 || expire == -1 {
 		expire = time.Hour * 24 * 7
 	}
 	var params url.Values