diff --git a/adapter/outbound/snell.go b/adapter/outbound/snell.go
index d0a26ecc..3b0dd4bc 100644
--- a/adapter/outbound/snell.go
+++ b/adapter/outbound/snell.go
@@ -52,7 +52,7 @@ func streamConn(c net.Conn, option streamOption) *snell.Snell {
 // StreamConn implements C.ProxyAdapter
 func (s *Snell) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 	c = streamConn(c, streamOption{s.psk, s.version, s.addr, s.obfsOption})
-	port, _ := strconv.ParseInt(metadata.DstPort, 10, 16)
+	port, _ := strconv.ParseUint(metadata.DstPort, 10, 16)
 	err := snell.WriteHeader(c, metadata.String(), uint(port), s.version)
 	return c, err
 }
diff --git a/component/dialer/bind_others.go b/component/dialer/bind_others.go
index a74995b5..2cabb48a 100644
--- a/component/dialer/bind_others.go
+++ b/component/dialer/bind_others.go
@@ -58,11 +58,11 @@ func bindIfaceToDialer(ifaceName string, dialer *net.Dialer, network string, des
 		return nil
 	}
 
-	local := int64(0)
+	local := uint64(0)
 	if dialer.LocalAddr != nil {
 		_, port, err := net.SplitHostPort(dialer.LocalAddr.String())
 		if err == nil {
-			local, _ = strconv.ParseInt(port, 10, 16)
+			local, _ = strconv.ParseUint(port, 10, 16)
 		}
 	}
 
@@ -82,7 +82,7 @@ func bindIfaceToListenConfig(ifaceName string, _ *net.ListenConfig, network, add
 		port = "0"
 	}
 
-	local, _ := strconv.ParseInt(port, 10, 16)
+	local, _ := strconv.ParseUint(port, 10, 16)
 
 	addr, err := lookupLocalAddr(ifaceName, network, nil, int(local))
 	if err != nil {
diff --git a/constant/metadata.go b/constant/metadata.go
index 9cc49973..a911b5e8 100644
--- a/constant/metadata.go
+++ b/constant/metadata.go
@@ -107,7 +107,7 @@ func (m *Metadata) UDPAddr() *net.UDPAddr {
 	if m.NetWork != UDP || m.DstIP == nil {
 		return nil
 	}
-	port, _ := strconv.ParseInt(m.DstPort, 10, 16)
+	port, _ := strconv.ParseUint(m.DstPort, 10, 16)
 	return &net.UDPAddr{
 		IP:   m.DstIP,
 		Port: int(port),