diff --git a/httputils/server.go b/httputils/server.go
index 120b55f..0292b0e 100644
--- a/httputils/server.go
+++ b/httputils/server.go
@@ -71,8 +71,8 @@ func (server *Server) Serve() {
 
 	if server.EnableHTTP2 {
 		server.TLSConfig.Config.NextProtos = []string{
+			"h2",
 			"http/1.1",
-			http2.H2TLSProto,
 		}
 	} else {
 		server.AddExtraHeader("Connection", "close")