diff --git a/crates/shadowsocks-service/src/config.rs b/crates/shadowsocks-service/src/config.rs
index 5f7e80faa36f..13026ba8eba8 100644
--- a/crates/shadowsocks-service/src/config.rs
+++ b/crates/shadowsocks-service/src/config.rs
@@ -70,7 +70,14 @@ use serde::{Deserialize, Serialize};
 use shadowsocks::relay::socks5::Address;
 use shadowsocks::{
     config::{
-        ManagerAddr, Mode, ReplayAttackPolicy, ServerAddr, ServerConfig, ServerSource, ServerUser, ServerUserManager,
+        ManagerAddr,
+        Mode,
+        ReplayAttackPolicy,
+        ServerAddr,
+        ServerConfig,
+        ServerSource,
+        ServerUser,
+        ServerUserManager,
         ServerWeight,
     },
     crypto::CipherKind,
diff --git a/crates/shadowsocks-service/src/local/http/http_client.rs b/crates/shadowsocks-service/src/local/http/http_client.rs
index 2db5426a1585..07fab66ece6c 100644
--- a/crates/shadowsocks-service/src/local/http/http_client.rs
+++ b/crates/shadowsocks-service/src/local/http/http_client.rs
@@ -64,7 +64,7 @@ impl Timer for TokioTimer {
 
     fn reset(&self, sleep: &mut Pin<Box<dyn Sleep>>, new_deadline: Instant) {
         if let Some(sleep) = sleep.as_mut().downcast_mut_pin::<TokioSleep>() {
-            sleep.reset(new_deadline.into())
+            sleep.reset(new_deadline)
         }
     }
 }
@@ -105,6 +105,17 @@ impl<B> Clone for HttpClient<B> {
     }
 }
 
+impl<B> Default for HttpClient<B>
+where
+    B: Body + Send + Unpin + Debug + 'static,
+    B::Data: Send,
+    B::Error: Into<Box<dyn ::std::error::Error + Send + Sync>>,
+{
+    fn default() -> Self {
+        HttpClient::new()
+    }
+}
+
 impl<B> HttpClient<B>
 where
     B: Body + Send + Unpin + Debug + 'static,
diff --git a/crates/shadowsocks-service/src/local/online_config/mod.rs b/crates/shadowsocks-service/src/local/online_config/mod.rs
index 09b2e9b7841c..31b891f2e4ca 100644
--- a/crates/shadowsocks-service/src/local/online_config/mod.rs
+++ b/crates/shadowsocks-service/src/local/online_config/mod.rs
@@ -164,7 +164,7 @@ impl OnlineConfigService {
 
         let parsed_body = match String::from_utf8(collected_body) {
             Ok(b) => b,
-            Err(..) => return Err(io::Error::new(io::ErrorKind::Other, "body contains non-utf8 bytes").into()),
+            Err(..) => return Err(io::Error::new(io::ErrorKind::Other, "body contains non-utf8 bytes")),
         };
 
         let online_config = match Config::load_from_str(&parsed_body, ConfigType::OnlineConfig) {
@@ -174,7 +174,7 @@ impl OnlineConfigService {
                     "server-loader task failed to load from url: {}, error: {}",
                     self.config_url, err
                 );
-                return Err(io::Error::new(io::ErrorKind::Other, err).into());
+                return Err(io::Error::new(io::ErrorKind::Other, err));
             }
         };
 
@@ -183,7 +183,7 @@ impl OnlineConfigService {
                 "server-loader task failed to load from url: {}, error: {}",
                 self.config_url, err
             );
-            return Err(io::Error::new(io::ErrorKind::Other, err).into());
+            return Err(io::Error::new(io::ErrorKind::Other, err));
         }
 
         let after_read_time = Instant::now();
diff --git a/src/service/local.rs b/src/service/local.rs
index d5bc5d58378d..78a0f8628108 100644
--- a/src/service/local.rs
+++ b/src/service/local.rs
@@ -24,7 +24,12 @@ use shadowsocks_service::shadowsocks::relay::socks5::Address;
 use shadowsocks_service::{
     acl::AccessControl,
     config::{
-        read_variable_field_value, Config, ConfigType, LocalConfig, LocalInstanceConfig, ProtocolType,
+        read_variable_field_value,
+        Config,
+        ConfigType,
+        LocalConfig,
+        LocalInstanceConfig,
+        ProtocolType,
         ServerInstanceConfig,
     },
     local::{loadbalancing::PingBalancer, Server},
@@ -39,7 +44,8 @@ use shadowsocks_service::{
 use crate::logging;
 use crate::{
     config::{Config as ServiceConfig, RuntimeMode},
-    monitor, vparser,
+    monitor,
+    vparser,
 };
 
 #[cfg(feature = "local-dns")]