diff --git a/src/android.rs b/src/android.rs
index 0f62d1c..52d6af3 100644
--- a/src/android.rs
+++ b/src/android.rs
@@ -35,7 +35,7 @@ pub unsafe extern "C" fn Java_com_github_shadowsocks_bg_Tun2proxy_run(
             .with_filter(filter),
     );
     let proxy_url = get_java_string(&mut env, &proxy_url).unwrap();
-    let proxy = ArgProxy::from_url(proxy_url).unwrap();
+    let proxy = ArgProxy::try_from(proxy_url).unwrap();
 
     let mut args = Args::default();
     args.proxy(proxy).tun_fd(Some(tun_fd)).dns(dns).verbosity(verbosity);
diff --git a/src/apple.rs b/src/apple.rs
index 87fc81b..0a5d1c3 100644
--- a/src/apple.rs
+++ b/src/apple.rs
@@ -31,7 +31,7 @@ pub unsafe extern "C" fn tun2proxy_with_fd_run(
     }
 
     let proxy_url = std::ffi::CStr::from_ptr(proxy_url).to_str().unwrap();
-    let proxy = ArgProxy::from_url(proxy_url).unwrap();
+    let proxy = ArgProxy::try_from(proxy_url).unwrap();
 
     let mut args = Args::default();
     args.proxy(proxy).tun_fd(Some(tun_fd)).dns(dns_strategy).verbosity(verbosity);
diff --git a/src/args.rs b/src/args.rs
index 46c00e8..b37521f 100644
--- a/src/args.rs
+++ b/src/args.rs
@@ -13,7 +13,7 @@ pub struct Args {
     /// where proto is one of socks4, socks5, http.
     /// Username and password are encoded in percent encoding. For example:
     /// socks5://myname:pass%40word@127.0.0.1:1080
-    #[arg(short, long, value_parser = ArgProxy::from_url, value_name = "URL")]
+    #[arg(short, long, value_parser = |s: &str| ArgProxy::try_from(s), value_name = "URL")]
     pub proxy: ArgProxy,
 
     /// Name of the tun interface, such as tun0, utun4, etc.
@@ -297,8 +297,9 @@ impl std::fmt::Display for ArgProxy {
     }
 }
 
-impl ArgProxy {
-    pub fn from_url(s: &str) -> Result<ArgProxy> {
+impl TryFrom<&str> for ArgProxy {
+    type Error = Error;
+    fn try_from(s: &str) -> Result<Self> {
         if s == "none" {
             return Ok(ArgProxy {
                 proxy_type: ProxyType::None,
diff --git a/src/desktop_api.rs b/src/desktop_api.rs
index 44f16c4..15288ef 100644
--- a/src/desktop_api.rs
+++ b/src/desktop_api.rs
@@ -47,7 +47,7 @@ pub unsafe extern "C" fn tun2proxy_with_name_run(
     }
 
     let proxy_url = std::ffi::CStr::from_ptr(proxy_url).to_str().unwrap();
-    let proxy = ArgProxy::from_url(proxy_url).unwrap();
+    let proxy = ArgProxy::try_from(proxy_url).unwrap();
     let tun = std::ffi::CStr::from_ptr(tun).to_str().unwrap().to_string();
 
     let mut args = Args::default();