diff --git a/internal/server/server.go b/internal/server/server.go
index 5c25a93..8d0d93d 100644
--- a/internal/server/server.go
+++ b/internal/server/server.go
@@ -7,14 +7,12 @@ import (
 	"net"
 	"net/http"
 	"net/http/httputil"
-	"strings"
 	"time"
 
 	"git.xeserv.us/xena/route/internal/database"
 	"git.xeserv.us/xena/route/internal/tun2"
 	proto "git.xeserv.us/xena/route/proto"
 	"github.com/Xe/ln"
-	"github.com/lucas-clemente/quic-go/protocol"
 	"github.com/mtneug/pkg/ulid"
 	kcp "github.com/xtaci/kcp-go"
 	"golang.org/x/crypto/acme/autocert"
@@ -169,13 +167,7 @@ func (s *Server) Director(r *http.Request) {
 	r.Header.Del("X-Forwarded-For")
 	r.Header.Del("X-Client-Ip")
 
-	var versions []string
-	for _, v := range protocol.SupportedVersions {
-		versions = append(versions, v.ToAltSvc())
-	}
-	versionsStr := strings.Join(versions, ",")
-
-	r.Header.Add("Alt-Svc", fmt.Sprintf(`quic="%s"; ma=2592000; v="%s"`, s.cfg.QuicAddr, versionsStr))
+	r.Header.Add("Alt-Svc", fmt.Sprintf(`quic="%s"; ma=2592000; v="39"`, s.cfg.QuicAddr))
 }
 
 func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {