diff --git a/src/resolver.rs b/src/resolver.rs
index 7c63c58..57fb1ea 100644
--- a/src/resolver.rs
+++ b/src/resolver.rs
@@ -1,7 +1,6 @@
 use crate::util;
 use rust_util::XResult;
 use std::fs;
-use std::os::unix::fs::PermissionsExt;
 use std::path::Path;
 
 // download from internet if starts with https://