diff --git a/src/utils/utils.go b/src/utils/utils.go
index 7fc074e..8a0224b 100644
--- a/src/utils/utils.go
+++ b/src/utils/utils.go
@@ -241,6 +241,7 @@ func RandomFileName() (fname string, err error) {
 		return
 	}
 	fname = f.Name()
+	_ = f.Close()
 	return
 }