diff --git a/phantun/Cargo.toml b/phantun/Cargo.toml
index a2506dd..134b5b1 100644
--- a/phantun/Cargo.toml
+++ b/phantun/Cargo.toml
@@ -11,7 +11,7 @@ Transforms UDP stream into (fake) TCP streams that can go through
 Layer 3 & Layer 4 (NAPT) firewalls/NATs.
 """
 [dependencies]
-clap = "2.34"
+clap = { version = "3.0", features = ["cargo"] }
 socket2 = { version = "0.4", features = ["all"] }
 fake-tcp = "0.2"
 tokio = { version = "1.14", features = ["full"] }
diff --git a/phantun/src/bin/client.rs b/phantun/src/bin/client.rs
index b723ecc..57a73fe 100644
--- a/phantun/src/bin/client.rs
+++ b/phantun/src/bin/client.rs
@@ -42,8 +42,8 @@ async fn main() {
         .version(crate_version!())
         .author("Datong Sun (github.com/dndx)")
         .arg(
-            Arg::with_name("local")
-                .short("l")
+            Arg::new("local")
+                .short('l')
                 .long("local")
                 .required(true)
                 .value_name("IP:PORT")
@@ -51,8 +51,8 @@ async fn main() {
                 .takes_value(true),
         )
         .arg(
-            Arg::with_name("remote")
-                .short("r")
+            Arg::new("remote")
+                .short('r')
                 .long("remote")
                 .required(true)
                 .value_name("IP or HOST NAME:PORT")
@@ -60,7 +60,7 @@ async fn main() {
                 .takes_value(true),
         )
         .arg(
-            Arg::with_name("tun")
+            Arg::new("tun")
                 .long("tun")
                 .required(false)
                 .value_name("tunX")
@@ -69,7 +69,7 @@ async fn main() {
                 .takes_value(true),
         )
         .arg(
-            Arg::with_name("tun_local")
+            Arg::new("tun_local")
                 .long("tun-local")
                 .required(false)
                 .value_name("IP")
@@ -78,7 +78,7 @@ async fn main() {
                 .takes_value(true),
         )
         .arg(
-            Arg::with_name("tun_peer")
+            Arg::new("tun_peer")
                 .long("tun-peer")
                 .required(false)
                 .value_name("IP")
diff --git a/phantun/src/bin/server.rs b/phantun/src/bin/server.rs
index 70267dd..431720e 100644
--- a/phantun/src/bin/server.rs
+++ b/phantun/src/bin/server.rs
@@ -16,8 +16,8 @@ async fn main() {
         .version(crate_version!())
         .author("Datong Sun (github.com/dndx)")
         .arg(
-            Arg::with_name("local")
-                .short("l")
+            Arg::new("local")
+                .short('l')
                 .long("local")
                 .required(true)
                 .value_name("PORT")
@@ -25,8 +25,8 @@ async fn main() {
                 .takes_value(true),
         )
         .arg(
-            Arg::with_name("remote")
-                .short("r")
+            Arg::new("remote")
+                .short('r')
                 .long("remote")
                 .required(true)
                 .value_name("IP or HOST NAME:PORT")
@@ -34,7 +34,7 @@ async fn main() {
                 .takes_value(true),
         )
         .arg(
-            Arg::with_name("tun")
+            Arg::new("tun")
                 .long("tun")
                 .required(false)
                 .value_name("tunX")
@@ -43,7 +43,7 @@ async fn main() {
                 .takes_value(true),
         )
         .arg(
-            Arg::with_name("tun_local")
+            Arg::new("tun_local")
                 .long("tun-local")
                 .required(false)
                 .value_name("IP")
@@ -52,7 +52,7 @@ async fn main() {
                 .takes_value(true),
         )
         .arg(
-            Arg::with_name("tun_peer")
+            Arg::new("tun_peer")
                 .long("tun-peer")
                 .required(false)
                 .value_name("IP")