diff --git a/flutter/pubspec.lock b/flutter/pubspec.lock
index 127e72993..a01a5a02b 100644
--- a/flutter/pubspec.lock
+++ b/flutter/pubspec.lock
@@ -1495,7 +1495,7 @@ packages:
     description:
       path: "."
       ref: HEAD
-      resolved-ref: "0728bd25ba1d625181573c26d3868efe21122190"
+      resolved-ref: "2c4b242e668acf4e652b09b13f650bcfbbaa3871"
       url: "https://github.com/rustdesk-org/window_manager"
     source: git
     version: "0.3.4"
diff --git a/src/ui_session_interface.rs b/src/ui_session_interface.rs
index bbbc48f3d..ed6052d39 100644
--- a/src/ui_session_interface.rs
+++ b/src/ui_session_interface.rs
@@ -7,7 +7,7 @@ use std::{
         atomic::{AtomicUsize, Ordering},
         Arc, Mutex, RwLock,
     },
-    time::{Duration, SystemTime},
+    time::SystemTime,
 };
 
 use async_trait::async_trait;