diff --git a/phantun/src/bin/client.rs b/phantun/src/bin/client.rs
index 57a73fe..c31ead6 100644
--- a/phantun/src/bin/client.rs
+++ b/phantun/src/bin/client.rs
@@ -1,4 +1,4 @@
-use clap::{crate_version, App, Arg};
+use clap::{crate_version, Arg, Command};
 use fake_tcp::packet::MAX_PACKET_LEN;
 use fake_tcp::{Socket, Stack};
 use log::{debug, error, info};
@@ -38,7 +38,7 @@ fn new_udp_reuseport(addr: SocketAddr) -> UdpSocket {
 async fn main() {
     pretty_env_logger::init();
 
-    let matches = App::new("Phantun Client")
+    let matches = Command::new("Phantun Client")
         .version(crate_version!())
         .author("Datong Sun (github.com/dndx)")
         .arg(
diff --git a/phantun/src/bin/server.rs b/phantun/src/bin/server.rs
index 431720e..6ab68a9 100644
--- a/phantun/src/bin/server.rs
+++ b/phantun/src/bin/server.rs
@@ -1,4 +1,4 @@
-use clap::{crate_version, App, Arg};
+use clap::{crate_version, Arg, Command};
 use fake_tcp::packet::MAX_PACKET_LEN;
 use fake_tcp::Stack;
 use log::{error, info};
@@ -12,7 +12,7 @@ const UDP_TTL: Duration = Duration::from_secs(180);
 async fn main() {
     pretty_env_logger::init();
 
-    let matches = App::new("Phantun Server")
+    let matches = Command::new("Phantun Server")
         .version(crate_version!())
         .author("Datong Sun (github.com/dndx)")
         .arg(