diff --git a/gost/http.go b/gost/http.go
index a8e7034..04b0e77 100644
--- a/gost/http.go
+++ b/gost/http.go
@@ -132,7 +132,11 @@ func (h *httpHandler) Handle(conn net.Conn) {
 	//	return
 	// }
 
-	cc, err := h.options.Chain.Dial(req.Host)
+	host := req.Host
+	if !strings.Contains(req.Host, ":") {
+		host += ":80"
+	}
+	cc, err := h.options.Chain.Dial(host)
 	if err != nil {
 		log.Logf("[http] %s -> %s : %s", conn.RemoteAddr(), req.Host, err)
 
diff --git a/gost/http2.go b/gost/http2.go
index 717d620..cbec64e 100644
--- a/gost/http2.go
+++ b/gost/http2.go
@@ -12,6 +12,7 @@ import (
 	"net/http"
 	"net/http/httputil"
 	"net/url"
+	"strings"
 	"sync"
 	"time"
 
@@ -187,6 +188,9 @@ func (h *http2Handler) handleFunc(w http.ResponseWriter, r *http.Request) {
 	if target == "" {
 		target = r.Host
 	}
+	if !strings.Contains(target, ":") {
+		target += ":80"
+	}
 
 	log.Logf("[http2] %s %s - %s %s", r.Method, r.RemoteAddr, target, r.Proto)
 	if Debug {