diff --git a/vendor/golang.org/x/net/http2/not_go111.go b/vendor/golang.org/x/net/http2/not_go111.go
index 161bca7..cc0baa8 100644
--- a/vendor/golang.org/x/net/http2/not_go111.go
+++ b/vendor/golang.org/x/net/http2/not_go111.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !go1.11
 // +build !go1.11
 
 package http2