diff --git a/go.mod b/go.mod
index 9a814dc8..02c1eeea 100644
--- a/go.mod
+++ b/go.mod
@@ -26,7 +26,7 @@ require (
 	github.com/sagernet/gvisor v0.0.0-20231209105102-8d27a30e436e
 	github.com/sagernet/quic-go v0.40.1
 	github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691
-	github.com/sagernet/sing v0.4.0-beta.12
+	github.com/sagernet/sing v0.4.0-beta.14
 	github.com/sagernet/sing-dns v0.1.14
 	github.com/sagernet/sing-mux v0.2.0
 	github.com/sagernet/sing-quic v0.1.11
diff --git a/go.sum b/go.sum
index 02cc76cc..225d267a 100644
--- a/go.sum
+++ b/go.sum
@@ -106,8 +106,8 @@ github.com/sagernet/quic-go v0.40.1/go.mod h1:CcKTpzTAISxrM4PA5M20/wYuz9Tj6Tx4Dw
 github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691 h1:5Th31OC6yj8byLGkEnIYp6grlXfo1QYUfiYFGjewIdc=
 github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691/go.mod h1:B8lp4WkQ1PwNnrVMM6KyuFR20pU8jYBD+A4EhJovEXU=
 github.com/sagernet/sing v0.2.18/go.mod h1:OL6k2F0vHmEzXz2KW19qQzu172FDgSbUSODylighuVo=
-github.com/sagernet/sing v0.4.0-beta.12 h1:f0f8DBPNf91NoAnJWm25LjPy/rC6u0R/nWIsGysl1cc=
-github.com/sagernet/sing v0.4.0-beta.12/go.mod h1:+60H3Cm91RnL9dpVGWDPHt0zTQImO9Vfqt9a4rSambI=
+github.com/sagernet/sing v0.4.0-beta.14 h1:9I1gWUUOguwfjv1KVdSNZFXARMSk5RsUHH49C2E9GIc=
+github.com/sagernet/sing v0.4.0-beta.14/go.mod h1:+60H3Cm91RnL9dpVGWDPHt0zTQImO9Vfqt9a4rSambI=
 github.com/sagernet/sing-dns v0.1.14 h1:kxE/Ik3jMXmD3sXsdt9MgrNzLFWt64mghV+MQqzyf40=
 github.com/sagernet/sing-dns v0.1.14/go.mod h1:AA+vZMNovuPN5i/sPnfF6756Nq94nzb5nXodMWbta5w=
 github.com/sagernet/sing-mux v0.2.0 h1:4C+vd8HztJCWNYfufvgL49xaOoOHXty2+EAjnzN3IYo=
diff --git a/transport/fakeip/packet.go b/transport/fakeip/packet.go
deleted file mode 100644
index 620acb92..00000000
--- a/transport/fakeip/packet.go
+++ /dev/null
@@ -1,55 +0,0 @@
-package fakeip
-
-import (
-	"github.com/sagernet/sing/common/buf"
-	M "github.com/sagernet/sing/common/metadata"
-	N "github.com/sagernet/sing/common/network"
-)
-
-var _ N.PacketConn = (*NATPacketConn)(nil)
-
-type NATPacketConn struct {
-	N.PacketConn
-	origin      M.Socksaddr
-	destination M.Socksaddr
-}
-
-func NewNATPacketConn(conn N.PacketConn, origin M.Socksaddr, destination M.Socksaddr) *NATPacketConn {
-	return &NATPacketConn{
-		PacketConn:  conn,
-		origin:      socksaddrWithoutPort(origin),
-		destination: socksaddrWithoutPort(destination),
-	}
-}
-
-func (c *NATPacketConn) ReadPacket(buffer *buf.Buffer) (destination M.Socksaddr, err error) {
-	destination, err = c.PacketConn.ReadPacket(buffer)
-	if socksaddrWithoutPort(destination) == c.origin {
-		destination = M.Socksaddr{
-			Addr: c.destination.Addr,
-			Fqdn: c.destination.Fqdn,
-			Port: destination.Port,
-		}
-	}
-	return
-}
-
-func (c *NATPacketConn) WritePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
-	if socksaddrWithoutPort(destination) == c.destination {
-		destination = M.Socksaddr{
-			Addr: c.origin.Addr,
-			Fqdn: c.origin.Fqdn,
-			Port: destination.Port,
-		}
-	}
-	return c.PacketConn.WritePacket(buffer, destination)
-}
-
-func (c *NATPacketConn) Upstream() any {
-	return c.PacketConn
-}
-
-func socksaddrWithoutPort(destination M.Socksaddr) M.Socksaddr {
-	destination.Port = 0
-	return destination
-}
diff --git a/transport/fakeip/packet_wait.go b/transport/fakeip/packet_wait.go
deleted file mode 100644
index 9fa4a5bd..00000000
--- a/transport/fakeip/packet_wait.go
+++ /dev/null
@@ -1,37 +0,0 @@
-package fakeip
-
-import (
-	"github.com/sagernet/sing/common/buf"
-	"github.com/sagernet/sing/common/bufio"
-	M "github.com/sagernet/sing/common/metadata"
-	N "github.com/sagernet/sing/common/network"
-)
-
-func (c *NATPacketConn) CreatePacketReadWaiter() (N.PacketReadWaiter, bool) {
-	waiter, created := bufio.CreatePacketReadWaiter(c.PacketConn)
-	if !created {
-		return nil, false
-	}
-	return &waitNATPacketConn{c, waiter}, true
-}
-
-type waitNATPacketConn struct {
-	*NATPacketConn
-	readWaiter N.PacketReadWaiter
-}
-
-func (c *waitNATPacketConn) InitializeReadWaiter(options N.ReadWaitOptions) (needCopy bool) {
-	return c.readWaiter.InitializeReadWaiter(options)
-}
-
-func (c *waitNATPacketConn) WaitReadPacket() (buffer *buf.Buffer, destination M.Socksaddr, err error) {
-	buffer, destination, err = c.readWaiter.WaitReadPacket()
-	if err == nil && socksaddrWithoutPort(destination) == c.origin {
-		destination = M.Socksaddr{
-			Addr: c.destination.Addr,
-			Fqdn: c.destination.Fqdn,
-			Port: destination.Port,
-		}
-	}
-	return
-}