diff --git a/go.mod b/go.mod
index e06a8fc71..47345e0bf 100644
--- a/go.mod
+++ b/go.mod
@@ -8,7 +8,7 @@ require (
 	github.com/xtaci/kcp-go/v5 v5.6.14
 	github.com/xtaci/qpp v1.1.17
 	github.com/xtaci/smux v1.5.26
-	github.com/xtaci/tcpraw v1.2.30
+	github.com/xtaci/tcpraw v1.2.31
 	golang.org/x/crypto v0.26.0
 )
 
diff --git a/go.sum b/go.sum
index 73f025550..4a3f25752 100644
--- a/go.sum
+++ b/go.sum
@@ -90,6 +90,8 @@ github.com/xtaci/tcpraw v1.2.29 h1:iVk1b2XiXNvIrMgtB3CkHCB/CigYXnG0tvFmOLUwCI8=
 github.com/xtaci/tcpraw v1.2.29/go.mod h1:T1blYD2EDkLneb+HtxddnzX38SoC9BG537EhkXeaT2k=
 github.com/xtaci/tcpraw v1.2.30 h1:JZlQaxcnSK0z827SPvV8bqqrv9SJdnQnnwX8Q7POFoM=
 github.com/xtaci/tcpraw v1.2.30/go.mod h1:T1blYD2EDkLneb+HtxddnzX38SoC9BG537EhkXeaT2k=
+github.com/xtaci/tcpraw v1.2.31 h1:i9mXzejnGJdGi0DpVKUn19Hq202/sHOJt0kObEwuE/U=
+github.com/xtaci/tcpraw v1.2.31/go.mod h1:T1blYD2EDkLneb+HtxddnzX38SoC9BG537EhkXeaT2k=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
diff --git a/vendor/github.com/xtaci/tcpraw/fingerprints.go b/vendor/github.com/xtaci/tcpraw/fingerprints.go
new file mode 100644
index 000000000..76ed6d241
--- /dev/null
+++ b/vendor/github.com/xtaci/tcpraw/fingerprints.go
@@ -0,0 +1,50 @@
+package tcpraw
+
+import (
+	"encoding/binary"
+	"time"
+
+	"github.com/google/gopacket/layers"
+)
+
+type FingerPrintType int
+
+const (
+	TypeLinux FingerPrintType = iota
+)
+
+type fingerPrint struct {
+	Type    FingerPrintType
+	Window  uint16
+	Options []layers.TCPOption
+	TTL     uint16
+}
+
+// options [nop,nop,TS val 1940162183 ecr 1366690553]
+var fingerPrintLinux = fingerPrint{
+	Type:   TypeLinux,
+	Window: 65535,
+	Options: []layers.TCPOption{
+		{1, 0, nil},
+		{1, 0, nil},
+		{8, 10, make([]byte, 10)}, // len = 10
+	},
+	TTL: 64,
+}
+
+var defaultFingerPrint = fingerPrintLinux
+
+var seed uint32
+
+func init() {
+	seed = uint32(time.Now().UnixNano())
+}
+
+func makeOption(optType FingerPrintType, options []layers.TCPOption) {
+	switch optType {
+	case TypeLinux:
+		nowMilli := time.Now().UnixNano() / 1e9
+		binary.BigEndian.PutUint32(options[2].OptionData[:4], uint32(nowMilli))
+		binary.BigEndian.PutUint32(options[2].OptionData[4:], uint32(seed+uint32(nowMilli)))
+	}
+}