diff --git a/dial.go b/dial.go
index 841592d..2bbfe5b 100644
--- a/dial.go
+++ b/dial.go
@@ -226,6 +226,14 @@ func (obj *Dialer) verifyProxyToRemote(ctx *Response, conn net.Conn, proxyTlsCon
 		return packCon, conn, err
 	}
 }
+
+func (obj *Dialer) LookupIPAddrWithCache(host string) net.IP {
+	msgDataAny, ok := obj.dnsIpData.Load(host)
+	if ok {
+		return msgDataAny.(msgClient).ip
+	}
+	return nil
+}
 func (obj *Dialer) loadHost(ctx *Response, host string) (net.IP, error) {
 	msgDataAny, ok := obj.dnsIpData.Load(host)
 	if ok {
diff --git a/roundTripper.go b/roundTripper.go
index 2a8f100..a1bb27c 100644
--- a/roundTripper.go
+++ b/roundTripper.go
@@ -261,7 +261,11 @@ func (obj *roundTripper) dial(ctx *Response) (conn *connecotr, err error) {
 }
 func (obj *roundTripper) dialConnecotr(ctx *Response, conne *connecotr, h2 bool) (err error) {
 	if h2 {
-		if conne.Conn, err = http2.NewClientConn(ctx.Context(), conne.c, ctx.option.gospiderSpec.H2Spec, func(err error) {
+		var spec *http2.Spec
+		if ctx.option.gospiderSpec != nil {
+			spec = ctx.option.gospiderSpec.H2Spec
+		}
+		if conne.Conn, err = http2.NewClientConn(ctx.Context(), conne.c, spec, func(err error) {
 			conne.forceCnl(tools.WrapError(err, "http2 client close"))
 		}); err != nil {
 			return err
@@ -276,7 +280,7 @@ func (obj *roundTripper) dialConnecotr(ctx *Response, conne *connecotr, h2 bool)
 func (obj *roundTripper) dialAddTls(option *RequestOption, req *http.Request, netConn net.Conn) (net.Conn, bool, error) {
 	ctx, cnl := context.WithTimeout(req.Context(), option.TlsHandshakeTimeout)
 	defer cnl()
-	if option.gospiderSpec.TLSSpec != nil {
+	if option.gospiderSpec != nil && option.gospiderSpec.TLSSpec != nil {
 		if tlsConn, err := obj.dialer.addJa3Tls(ctx, netConn, getHost(req), option.gospiderSpec.TLSSpec, option.UtlsConfig.Clone(), option.ForceHttp1); err != nil {
 			return tlsConn, false, tools.WrapError(err, "add ja3 tls error")
 		} else {
diff --git a/test/proxy/http3_proxy_test.go b/test/proxy/http3_proxy_test.go
index 299fcd6..ceb55e2 100644
--- a/test/proxy/http3_proxy_test.go
+++ b/test/proxy/http3_proxy_test.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"crypto/tls"
 	"log"
+	"net"
 	"testing"
 
 	"fmt"
@@ -89,7 +90,7 @@ func server() {
 			fmt.Fprint(w, "method is not supported")
 		}
 	})
-	tlsCert, err := gtls.CreateProxyCertWithName("localhost")
+	tlsCert, err := gtls.CreateCertWithAddr(net.IP{127, 0, 0, 1})
 	if err != nil {
 		panic(err)
 	}