diff --git a/example.nginx.conf b/example.nginx.conf
index f57a6d9..aec02e6 100644
--- a/example.nginx.conf
+++ b/example.nginx.conf
@@ -43,7 +43,7 @@ http {
         proxy_request_buffering off;
 
         # Add Alt-Svc header to negotiate HTTP/3.
-        add_header alt-svc 'h3-27=":443"; ma=86400';
+        add_header alt-svc 'h3-29=":443"; ma=86400';
 
         location / {
             root   html;