diff --git a/http.go b/http.go
index fb352e4..0612f50 100644
--- a/http.go
+++ b/http.go
@@ -94,16 +94,28 @@ func (h *httpHandler) Handle(conn net.Conn) {
 	}
 
 	if Debug {
-		log.Logf("[http] %s %s - %s %s", req.Method, conn.RemoteAddr(), req.Host, req.Proto)
 		dump, _ := httputil.DumpRequest(req, false)
-		log.Logf(string(dump))
+		log.Logf("[http] %s -> %s\n%s", conn.RemoteAddr(), req.Host, string(dump))
 	}
 
-	if req.Method == "PRI" && req.ProtoMajor == 2 {
-		log.Logf("[http] %s <- %s : Not an HTTP2 server", conn.RemoteAddr(), req.Host)
+	if req.Method == "PRI" || (req.Method != http.MethodConnect && req.URL.Scheme != "http") {
 		resp := "HTTP/1.1 400 Bad Request\r\n" +
 			"Proxy-Agent: gost/" + Version + "\r\n\r\n"
 		conn.Write([]byte(resp))
+		if Debug {
+			log.Logf("[http] %s <- %s\n%s", conn.RemoteAddr(), req.Host, resp)
+		}
+		return
+	}
+
+	if !Can("tcp", req.Host, h.options.Whitelist, h.options.Blacklist) {
+		log.Logf("[http] Unauthorized to tcp connect to %s", req.Host)
+		b := []byte("HTTP/1.1 403 Forbidden\r\n" +
+			"Proxy-Agent: gost/" + Version + "\r\n\r\n")
+		conn.Write(b)
+		if Debug {
+			log.Logf("[http] %s <- %s\n%s", conn.RemoteAddr(), req.Host, string(b))
+		}
 		return
 	}
 
@@ -121,18 +133,7 @@ func (h *httpHandler) Handle(conn net.Conn) {
 	}
 
 	req.Header.Del("Proxy-Authorization")
-	req.Header.Del("Proxy-Connection")
-
-	if !Can("tcp", req.Host, h.options.Whitelist, h.options.Blacklist) {
-		log.Logf("[http] Unauthorized to tcp connect to %s", req.Host)
-		b := []byte("HTTP/1.1 403 Forbidden\r\n" +
-			"Proxy-Agent: gost/" + Version + "\r\n\r\n")
-		conn.Write(b)
-		if Debug {
-			log.Logf("[http] %s <- %s\n%s", conn.RemoteAddr(), req.Host, string(b))
-		}
-		return
-	}
+	// req.Header.Del("Proxy-Connection")
 
 	// try to get the actual host.
 	if v := req.Header.Get("Gost-Target"); v != "" {
diff --git a/socks.go b/socks.go
index 858e725..1bb4533 100644
--- a/socks.go
+++ b/socks.go
@@ -261,6 +261,9 @@ func (c *socks4Connector) Connect(conn net.Conn, addr string) (net.Conn, error)
 	if err != nil {
 		return nil, err
 	}
+	if len(taddr.IP) == 0 {
+		taddr.IP = net.IPv4(0, 0, 0, 0)
+	}
 
 	req := gosocks4.NewRequest(gosocks4.CmdConnect,
 		&gosocks4.Addr{
diff --git a/ss.go b/ss.go
index e66a1d0..3cc702d 100644
--- a/ss.go
+++ b/ss.go
@@ -172,10 +172,12 @@ func (h *shadowHandler) getRequest(conn net.Conn) (host string, err error) {
 	buf := make([]byte, smallBufferSize)
 
 	// read till we get possible domain length field
-	conn.SetReadDeadline(time.Now().Add(30 * time.Second))
+	conn.SetReadDeadline(time.Now().Add(ReadTimeout))
 	if _, err = io.ReadFull(conn, buf[:idType+1]); err != nil {
 		return
 	}
+	// clear timer
+	conn.SetReadDeadline(time.Time{})
 
 	var reqStart, reqEnd int
 	addrType := buf[idType]
diff --git a/vendor/github.com/ginuerzh/gosocks4/socks4.go b/vendor/github.com/ginuerzh/gosocks4/socks4.go
index 52b32e4..2377ac5 100644
--- a/vendor/github.com/ginuerzh/gosocks4/socks4.go
+++ b/vendor/github.com/ginuerzh/gosocks4/socks4.go
@@ -56,7 +56,7 @@ func (addr *Addr) Decode(b []byte) error {
 	addr.Port = binary.BigEndian.Uint16(b[0:2])
 	addr.Host = net.IP(b[2 : 2+net.IPv4len]).String()
 
-	if b[2]|b[3]|b[4] == 0 {
+	if b[2]|b[3]|b[4] == 0 && b[5] != 0 {
 		addr.Type = AddrDomain
 	}
 
diff --git a/vendor/vendor.json b/vendor/vendor.json
index 1569af6..354683e 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -81,10 +81,10 @@
 			"revisionTime": "2016-08-31T15:17:26Z"
 		},
 		{
-			"checksumSHA1": "aIhLeVAIrsjs63CwqmU3+GU8yT4=",
+			"checksumSHA1": "AqX1ZPaQtMCpfiTiA2zGmWadYl0=",
 			"path": "github.com/ginuerzh/gosocks4",
-			"revision": "fc196f9d34e35f19a813bff2f092a275131c23bc",
-			"revisionTime": "2017-02-09T14:09:51Z"
+			"revision": "c3a6700bad67bd29718fd19212b3dd934aea89b3",
+			"revisionTime": "2017-09-04T03:46:09Z"
 		},
 		{
 			"checksumSHA1": "Onmjh8hT6pjAixkuGJN4KKAaTT4=",