diff --git a/build.rs b/build.rs
index 5ed40b001..d9b7a5516 100644
--- a/build.rs
+++ b/build.rs
@@ -78,8 +78,6 @@ fn install_oboe() {
 
 fn gen_flutter_rust_bridge() {
     // Get dependent of flutter
-    println!("cargo:rerun-if-changed=flutter/pubspec.lock");
-    println!("cargo:rerun-if-changed=flutter/pubspec.yaml");
     if !std::path::Path::new("./flutter/.packages").exists(){
         std::process::Command::new("flutter")
         .args(["pub", "get"])
diff --git a/src/client.rs b/src/client.rs
index e47667f72..2bc60765a 100644
--- a/src/client.rs
+++ b/src/client.rs
@@ -61,7 +61,6 @@ pub struct Client;
 lazy_static::lazy_static! {
     static ref AUDIO_HOST: Host = cpal::default_host();
 }
-use rdev::{Event, EventType::*, Key as RdevKey, Keyboard as RdevKeyboard, KeyboardState};
 
 #[cfg(not(any(target_os = "android", target_os = "ios")))]
 lazy_static::lazy_static! {
diff --git a/src/common.rs b/src/common.rs
index 5c387c07e..81adebb0a 100644
--- a/src/common.rs
+++ b/src/common.rs
@@ -668,7 +668,6 @@ pub fn make_privacy_mode_msg(state: back_notification::PrivacyModeState) -> Mess
 }
 
 pub fn make_fd_to_json(fd: FileDirectory) -> String {
-    use serde_json::json;
     let mut fd_json = serde_json::Map::new();
     fd_json.insert("id".into(), json!(fd.id));
     fd_json.insert("path".into(), json!(fd.path));
diff --git a/src/flutter_ffi.rs b/src/flutter_ffi.rs
index bc1335970..78f53bf89 100644
--- a/src/flutter_ffi.rs
+++ b/src/flutter_ffi.rs
@@ -5,13 +5,13 @@ use std::{
 };
 
 use flutter_rust_bridge::{StreamSink, SyncReturn, ZeroCopyBuffer};
-use serde_json::{json, Number, Value};
+use serde_json::json;
 
 use hbb_common::{
-    config::{self, Config, LocalConfig, PeerConfig, ONLINE},
+    config::{self, LocalConfig, PeerConfig, ONLINE},
     fs, log,
 };
-use hbb_common::{password_security, ResultType};
+use hbb_common::{ResultType};
 
 use crate::{client::file_trait::FileManager, flutter::{session_add, session_start_}};
 use crate::common::make_fd_to_json;
@@ -20,7 +20,7 @@ use crate::flutter::{self, SESSIONS};
 use crate::start_server;
 use crate::ui_interface;
 #[cfg(not(any(target_os = "android", target_os = "ios")))]
-use crate::ui_interface::{change_id, check_connect_status, is_ok_change_id};
+use crate::ui_interface::{change_id};
 use crate::ui_interface::{
     check_mouse_time, check_super_user_permission, discover, forget_password, get_api_server,
     get_app_name, get_async_job_status, get_connect_status, get_fav, get_id, get_lan_peers,
diff --git a/src/rendezvous_mediator.rs b/src/rendezvous_mediator.rs
index 08a1316f0..802fed1de 100644
--- a/src/rendezvous_mediator.rs
+++ b/src/rendezvous_mediator.rs
@@ -1,4 +1,3 @@
-use std::collections::HashMap;
 use std::{
     net::SocketAddr,
     sync::{
@@ -10,12 +9,10 @@ use std::{
 
 use uuid::Uuid;
 
-use hbb_common::config::DiscoveryPeer;
 use hbb_common::tcp::FramedStream;
 use hbb_common::{
     allow_err,
     anyhow::bail,
-    config,
     config::{Config, REG_INTERVAL, RENDEZVOUS_PORT, RENDEZVOUS_TIMEOUT},
     futures::future::join_all,
     log,
@@ -640,7 +637,7 @@ pub async fn query_online_states<F: FnOnce(Vec<String>, Vec<String>)>(ids: Vec<S
 }
 
 async fn create_online_stream() -> ResultType<FramedStream> {
-    let (mut rendezvous_server, servers, contained) = crate::get_rendezvous_server(1_000).await;
+    let (mut rendezvous_server, _servers, _contained) = crate::get_rendezvous_server(1_000).await;
     let tmp: Vec<&str> = rendezvous_server.split(":").collect();
     if tmp.len() != 2 {
         bail!("Invalid server address: {}", rendezvous_server);
diff --git a/src/server/connection.rs b/src/server/connection.rs
index e71b32e35..d93d6d775 100644
--- a/src/server/connection.rs
+++ b/src/server/connection.rs
@@ -633,7 +633,7 @@ impl Connection {
         let mut pi = PeerInfo {
             username: username.clone(),
             conn_id: self.inner.id,
-            version: crate::VERSION.to_owned(),
+            version: VERSION.to_owned(),
             ..Default::default()
         };
 
diff --git a/src/server/input_service.rs b/src/server/input_service.rs
index b72370d12..e0707bded 100644
--- a/src/server/input_service.rs
+++ b/src/server/input_service.rs
@@ -673,12 +673,12 @@ fn tfc_key_down_or_up(key: Key, down: bool, up: bool) {
     if let Key::Layout(chr) = key {
         log::info!("tfc_key_down_or_up :{:?}", chr);
         if down {
-            if let Err(e) = TFC_CONTEXT.lock().unwrap().unicode_char_down(chr){
+            if let Err(_) = TFC_CONTEXT.lock().unwrap().unicode_char_down(chr){
                 log::error!("Failed to press char {:?}", chr);
             };
         }
         if up {
-            if let Err(e) = TFC_CONTEXT.lock().unwrap().unicode_char_down(chr){
+            if let Err(_) = TFC_CONTEXT.lock().unwrap().unicode_char_down(chr){
                 log::error!("Failed to press char {:?}",chr);
             };
         }
@@ -753,12 +753,12 @@ fn tfc_key_down_or_up(key: Key, down: bool, up: bool) {
 
     log::info!("tfc_key_down_or_up: {:?}", key);
     if down {
-        if let Err(e) = TFC_CONTEXT.lock().unwrap().key_down(key){
+        if let Err(_) = TFC_CONTEXT.lock().unwrap().key_down(key){
             log::error!("Failed to press char {:?}", key);
         };
     }
     if up {
-        if let Err(e) = TFC_CONTEXT.lock().unwrap().key_up(key){
+        if let Err(_) = TFC_CONTEXT.lock().unwrap().key_up(key){
             log::error!("Failed to press char {:?}", key);
         };
     }
diff --git a/src/ui.rs b/src/ui.rs
index b66d1453b..0e754e622 100644
--- a/src/ui.rs
+++ b/src/ui.rs
@@ -9,7 +9,7 @@ use sciter::Value;
 
 use hbb_common::{
     allow_err,
-    config::{self, Config, LocalConfig, PeerConfig, RENDEZVOUS_PORT, RENDEZVOUS_TIMEOUT},
+    config::{self, Config, PeerConfig, RENDEZVOUS_PORT, RENDEZVOUS_TIMEOUT},
     futures::future::join_all,
     log,
     protobuf::Message as _,
@@ -19,7 +19,7 @@ use hbb_common::{
     tokio::{self, sync::mpsc, time},
 };
 
-use crate::common::{get_app_name, SOFTWARE_UPDATE_URL};
+use crate::common::{get_app_name};
 use crate::ipc;
 use crate::ui_interface::{
     check_mouse_time, closing, create_shortcut, current_is_wayland, fix_login_wayland,
diff --git a/src/ui/cm.rs b/src/ui/cm.rs
index 3200d51b4..bef0ee3bd 100644
--- a/src/ui/cm.rs
+++ b/src/ui/cm.rs
@@ -6,13 +6,13 @@ use clipboard::{
     create_cliprdr_context, empty_clipboard, get_rx_clip_client, server_clip_file, set_conn_enabled,
 };
 use hbb_common::fs::{
-    can_enable_overwrite_detection, get_string, is_write_need_confirmation, new_send_confirm,
+    get_string, is_write_need_confirmation, new_send_confirm,
     DigestCheckResult,
 };
 use hbb_common::{
     allow_err,
     config::Config,
-    fs, get_version_number, log,
+    fs, log,
     message_proto::*,
     protobuf::Message as _,
     tokio::{self, sync::mpsc, task::spawn_blocking},
diff --git a/src/ui/remote.rs b/src/ui/remote.rs
index 91dd08fdc..093ad901e 100644
--- a/src/ui/remote.rs
+++ b/src/ui/remote.rs
@@ -2,7 +2,7 @@ use std::{
     collections::HashMap,
     ops::{Deref, DerefMut},
     sync::{
-        atomic::{AtomicBool, Ordering},
+        atomic::{Ordering},
         Arc, Mutex,
     },
 };
diff --git a/src/ui_session_interface.rs b/src/ui_session_interface.rs
index 33949a116..4f5ec55b8 100644
--- a/src/ui_session_interface.rs
+++ b/src/ui_session_interface.rs
@@ -6,7 +6,6 @@ use crate::client::{
     load_config, send_mouse, start_video_audio_threads, FileManager, Key, LoginConfigHandler,
     QualityStatus, KEY_MAP, SERVER_KEYBOARD_ENABLED,
 };
-use crate::common;
 use crate::{client::Data, client::Interface};
 use async_trait::async_trait;