diff --git a/rpxy-lib/src/backend/backend_main.rs b/rpxy-lib/src/backend/backend_main.rs
index af05704..5524956 100644
--- a/rpxy-lib/src/backend/backend_main.rs
+++ b/rpxy-lib/src/backend/backend_main.rs
@@ -26,6 +26,7 @@ pub struct BackendApp {
   pub https_redirection: Option<bool>,
   /// tls settings: mutual TLS is enabled
   #[builder(default)]
+  #[allow(unused)]
   pub mutual_tls: Option<bool>,
 }
 impl<'a> BackendAppBuilder {
diff --git a/rpxy-lib/src/proxy/proxy_h3.rs b/rpxy-lib/src/proxy/proxy_h3.rs
index acfe07d..1eed0c5 100644
--- a/rpxy-lib/src/proxy/proxy_h3.rs
+++ b/rpxy-lib/src/proxy/proxy_h3.rs
@@ -68,7 +68,7 @@ where
             h3_conn.shutdown(0).await?;
             break;
           }
-          debug!("Request incoming: current # {}", request_count.current());
+          trace!("Request incoming: current # {}", request_count.current());
 
           let self_inner = self.clone();
           let tls_server_name_inner = tls_server_name.clone();
@@ -82,7 +82,7 @@ where
               warn!("HTTP/3 error on serve stream: {}", e);
             }
             request_count.decrement();
-            debug!("Request processed: current # {}", request_count.current());
+            trace!("Request processed: current # {}", request_count.current());
           });
         }
       }
diff --git a/rpxy-lib/src/proxy/proxy_main.rs b/rpxy-lib/src/proxy/proxy_main.rs
index cfc8b6e..b858072 100644
--- a/rpxy-lib/src/proxy/proxy_main.rs
+++ b/rpxy-lib/src/proxy/proxy_main.rs
@@ -80,7 +80,7 @@ where
       request_count.decrement();
       return;
     }
-    debug!("Request incoming: current # {}", request_count.current());
+    trace!("Request incoming: current # {}", request_count.current());
 
     let server_clone = self.connection_builder.clone();
     let message_handler_clone = self.message_handler.clone();
@@ -110,7 +110,7 @@ where
       }
 
       request_count.decrement();
-      debug!("Request processed: current # {}", request_count.current());
+      trace!("Request processed: current # {}", request_count.current());
     });
   }
 
@@ -131,52 +131,55 @@ where
 
   /// Start with TLS (HTTPS)
   pub(super) async fn start_with_tls(&self, cancel_token: CancellationToken) -> RpxyResult<()> {
+    // By default, TLS listener is spawned
+    let join_handle_tls = self.globals.runtime_handle.spawn({
+      let self_clone = self.clone();
+      let cancel_token = cancel_token.clone();
+      async move {
+        select! {
+          _ = self_clone.tls_listener_service().fuse() => {
+            error!("TCP proxy service for TLS exited");
+            cancel_token.cancel();
+          },
+          _ = cancel_token.cancelled().fuse() => {
+            debug!("Cancel token is called for TLS listener");
+          }
+        }
+      }
+    });
+
     #[cfg(not(any(feature = "http3-quinn", feature = "http3-s2n")))]
     {
-      self.tls_listener_service().await?;
-      error!("TCP proxy service for TLS exited");
+      let _ = join_handle_tls.await;
       Ok(())
     }
+
     #[cfg(any(feature = "http3-quinn", feature = "http3-s2n"))]
     {
-      if self.globals.proxy_config.http3 {
-        let jh_tls = self.globals.runtime_handle.spawn({
-          let self_clone = self.clone();
-          let cancel_token = cancel_token.clone();
-          async move {
-            select! {
-              _ = self_clone.tls_listener_service().fuse() => {
-                error!("TCP proxy service for TLS exited");
-                cancel_token.cancel();
-              },
-              _ = cancel_token.cancelled().fuse() => {
-                debug!("Cancel token is called for TLS listener");
-              }
-            }
-          }
-        });
-        let jh_h3 = self.globals.runtime_handle.spawn({
-          let self_clone = self.clone();
-          async move {
-            select! {
-              _ = self_clone.h3_listener_service().fuse() => {
-                error!("UDP proxy service for QUIC exited");
-                cancel_token.cancel();
-              },
-              _ = cancel_token.cancelled().fuse() => {
-                debug!("Cancel token is called for QUIC listener");
-              }
-            }
-          }
-        });
-        let _ = futures::future::join(jh_tls, jh_h3).await;
-
-        Ok(())
-      } else {
-        self.tls_listener_service().await?;
-        error!("TCP proxy service for TLS exited");
-        Ok(())
+      // If HTTP/3 is not enabled, wait for TLS listener to finish
+      if !self.globals.proxy_config.http3 {
+        let _ = join_handle_tls.await;
+        return Ok(());
       }
+
+      // If HTTP/3 is enabled, spawn a task to handle HTTP/3 connections
+      let join_handle_h3 = self.globals.runtime_handle.spawn({
+        let self_clone = self.clone();
+        async move {
+          select! {
+            _ = self_clone.h3_listener_service().fuse() => {
+              error!("UDP proxy service for QUIC exited");
+              cancel_token.cancel();
+            },
+            _ = cancel_token.cancelled().fuse() => {
+              debug!("Cancel token is called for QUIC listener");
+            }
+          }
+        }
+      });
+      let _ = futures::future::join(join_handle_tls, join_handle_h3).await;
+
+      Ok(())
     }
   }
 
diff --git a/rpxy-lib/src/proxy/socket.rs b/rpxy-lib/src/proxy/socket.rs
index 322b42b..fbb810d 100644
--- a/rpxy-lib/src/proxy/socket.rs
+++ b/rpxy-lib/src/proxy/socket.rs
@@ -16,10 +16,12 @@ pub(super) fn bind_tcp_socket(listening_on: &SocketAddr) -> RpxyResult<TcpSocket
   }?;
   tcp_socket.set_reuseaddr(true)?;
   tcp_socket.set_reuseport(true)?;
-  if let Err(e) = tcp_socket.bind(*listening_on) {
+
+  tcp_socket.bind(*listening_on).map_err(|e| {
     error!("Failed to bind TCP socket: {}", e);
-    return Err(RpxyError::Io(e));
-  };
+    RpxyError::Io(e)
+  })?;
+
   Ok(tcp_socket)
 }
 
@@ -36,11 +38,10 @@ pub(super) fn bind_udp_socket(listening_on: &SocketAddr) -> RpxyResult<UdpSocket
   socket.set_reuse_port(true)?;
   socket.set_nonblocking(true)?; // This was made true inside quinn. so this line isn't necessary here. but just in case.
 
-  if let Err(e) = socket.bind(&(*listening_on).into()) {
+  socket.bind(&(*listening_on).into()).map_err(|e| {
     error!("Failed to bind UDP socket: {}", e);
-    return Err(RpxyError::Io(e));
-  };
-  let udp_socket: UdpSocket = socket.into();
+    RpxyError::Io(e)
+  })?;
 
-  Ok(udp_socket)
+  Ok(socket.into())
 }