diff --git a/go.mod b/go.mod
index 87a6948..486220f 100644
--- a/go.mod
+++ b/go.mod
@@ -4,13 +4,14 @@ go 1.18
 
 require (
 	github.com/fatih/color v1.13.0
-	github.com/grpc/grpc/tools/http2_interop v0.0.0-20220615001509-d0751191a921
 	github.com/olekukonko/tablewriter v0.0.5
+	golang.org/x/net v0.0.0-20220728211354-c7608f3a8462
 )
 
 require (
 	github.com/mattn/go-colorable v0.1.9 // indirect
 	github.com/mattn/go-isatty v0.0.14 // indirect
 	github.com/mattn/go-runewidth v0.0.9 // indirect
-	golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c // indirect
+	golang.org/x/sys v0.0.0-20220728004956-3c1f35247d10 // indirect
+	golang.org/x/text v0.3.7 // indirect
 )
diff --git a/go.sum b/go.sum
index 4c36bc5..6d2ad7e 100644
--- a/go.sum
+++ b/go.sum
@@ -1,7 +1,5 @@
 github.com/fatih/color v1.13.0 h1:8LOYc1KYPPmyKMuN8QV2DNRWNbLo6LZ0iLs8+mlH53w=
 github.com/fatih/color v1.13.0/go.mod h1:kLAiJbzzSOZDVNGyDpeOxJ47H46qBXwg5ILebYFFOfk=
-github.com/grpc/grpc/tools/http2_interop v0.0.0-20220615001509-d0751191a921 h1:zTONUZ32JlNtzbzxOEcAhV3vMwXX0bGkS803DYf4RBM=
-github.com/grpc/grpc/tools/http2_interop v0.0.0-20220615001509-d0751191a921/go.mod h1:BeiyA4wp8QEh/jcnxJlpfalCT/XiQ5bbFhikEDrXQcw=
 github.com/mattn/go-colorable v0.1.9 h1:sqDoxXbdeALODt0DAeJCVp38ps9ZogZEAXjus69YV3U=
 github.com/mattn/go-colorable v0.1.9/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
@@ -11,7 +9,12 @@ github.com/mattn/go-runewidth v0.0.9 h1:Lm995f3rfxdpd6TSmuVCHVb/QhupuXlYr8sCI/Qd
 github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
 github.com/olekukonko/tablewriter v0.0.5 h1:P2Ga83D34wi1o9J6Wh1mRuqd4mF/x/lgBS7N7AbDhec=
 github.com/olekukonko/tablewriter v0.0.5/go.mod h1:hPp6KlRPjbx+hW8ykQs1w3UBbZlj6HuIJcUGPhkA7kY=
+golang.org/x/net v0.0.0-20220728211354-c7608f3a8462 h1:UreQrH7DbFXSi9ZFox6FNT3WBooWmdANpU+IfkT1T4I=
+golang.org/x/net v0.0.0-20220728211354-c7608f3a8462/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
 golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c h1:F1jZWGFhYfh0Ci55sIpILtKKK8p3i2/krTr0H1rg74I=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220728004956-3c1f35247d10 h1:WIoqL4EROvwiPdUtaip4VcDdpZ4kha7wBWZrbVKCIZg=
+golang.org/x/sys v0.0.0-20220728004956-3c1f35247d10/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
diff --git a/protocol/grpc.go b/protocol/grpc.go
index 46b59d9..a39c0d4 100644
--- a/protocol/grpc.go
+++ b/protocol/grpc.go
@@ -1,15 +1,15 @@
 package protocol
 
 import (
-	"encoding/binary"
+	"bytes"
 	"encoding/hex"
 	"fmt"
 	"io"
 	"strings"
 
 	"github.com/fatih/color"
-	"github.com/grpc/grpc/tools/http2_interop"
 	"github.com/kevwan/tproxy/display"
+	"golang.org/x/net/http2"
 )
 
 const (
@@ -59,22 +59,35 @@ func (i *GrpcInterop) explain(b []byte) (string, int) {
 		return "", len(b)
 	}
 
-	var frame http2interop.FrameHeader
-	// ignore errors
-	if err := frame.UnmarshalBinary(b[:http2HeaderLen]); err != nil {
+	frame, err := http2.ReadFrameHeader(bytes.NewReader(b[:http2HeaderLen]))
+	if err != nil {
 		return "", len(b)
 	}
 
-	if frame.Type == http2interop.FrameType(priFrameType) {
-		return "http2:pri", len(b)
+	frameLen := http2HeaderLen + int(frame.Length)
+	switch frame.Type {
+	case priFrameType:
+		return "http2:preface", frameLen
+	case http2.FrameSettings:
+		switch frame.Flags {
+		case http2.FlagSettingsAck:
+			return "http2:settings:ack", frameLen
+		default:
+			return "http2:settings", frameLen
+		}
+	case http2.FramePing:
+		switch frame.Flags {
+		case http2.FlagPingAck:
+			return "http2:ping:ack", frameLen
+		default:
+			return "http2:ping", frameLen
+		}
 	}
 
-	payloadLen := binary.BigEndian.Uint32(append([]byte{0}, b[:3]...))
-	id := binary.BigEndian.Uint32(b[5:http2HeaderLen]) & 0x7fffffff
-	if id > 0 {
-		return fmt.Sprintf("http2:%s stream:%d", strings.ToLower(frame.Type.String()), id),
-			http2HeaderLen + int(payloadLen)
+	if frame.StreamID > 0 {
+		desc := fmt.Sprintf("http2:%s stream:%d", strings.ToLower(frame.Type.String()), frame.StreamID)
+		return desc, frameLen
 	}
 
-	return "http2:" + strings.ToLower(frame.Type.String()), http2HeaderLen + int(payloadLen)
+	return "http2:" + strings.ToLower(frame.Type.String()), frameLen
 }
diff --git a/protocol/dump.go b/protocol/interop.go
similarity index 81%
rename from protocol/dump.go
rename to protocol/interop.go
index 0907398..e4defb0 100644
--- a/protocol/dump.go
+++ b/protocol/interop.go
@@ -13,7 +13,7 @@ const (
 	grpcProtocol = "grpc"
 )
 
-var defaultDumper Dumper
+var interop defaultInterop
 
 type Interop interface {
 	Dump(r io.Reader, source string, id int, quiet bool)
@@ -24,13 +24,13 @@ func CreateInterop(protocol string) Interop {
 	case grpcProtocol:
 		return new(GrpcInterop)
 	default:
-		return defaultDumper
+		return interop
 	}
 }
 
-type Dumper struct{}
+type defaultInterop struct{}
 
-func (d Dumper) Dump(r io.Reader, source string, id int, quiet bool) {
+func (d defaultInterop) Dump(r io.Reader, source string, id int, quiet bool) {
 	data := make([]byte, bufferSize)
 	for {
 		n, err := r.Read(data)