diff --git a/vendor/golang.org/x/net/http2/h2demo/Dockerfile.0 b/vendor/golang.org/x/net/http2/h2demo/Dockerfile.0
index fd8435d31..fdaf9813d 100644
--- a/vendor/golang.org/x/net/http2/h2demo/Dockerfile.0
+++ b/vendor/golang.org/x/net/http2/h2demo/Dockerfile.0
@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-FROM golang:1.9
+FROM golang:1.21.7
 LABEL maintainer "golang-dev@googlegroups.com"
 
 ENV CGO_ENABLED=0