diff -Nur a/doc/libmicrohttpd-tutorial.texi b/doc/libmicrohttpd-tutorial.texi
--- a/doc/libmicrohttpd-tutorial.texi	2021-12-27 01:30:00.000000000 +0800
+++ b/doc/libmicrohttpd-tutorial.texi	2022-08-27 10:39:16.578248526 +0800
@@ -68,7 +68,6 @@
 * Improved processing of POST data::
 * Session management::
 * Adding a layer of security::
-* Websockets::
 * Bibliography::
 * License text::
 * Example programs::
@@ -110,10 +109,6 @@
 @chapter Adding a layer of security
 @include chapters/tlsauthentication.inc
 
-@node Websockets
-@chapter Websockets
-@include chapters/websocket.inc
-
 @node Bibliography
 @appendix Bibliography
 @include chapters/bibliography.inc
@@ -133,7 +128,6 @@
 * largepost.c::
 * sessions.c::
 * tlsauthentication.c::
-* websocket.c::
 @end menu
 
 @node hellobrowser.c
@@ -184,10 +178,4 @@
 @verbatiminclude examples/tlsauthentication.c
 @end smalldisplay
 
-@node websocket.c
-@section websocket.c
-@smalldisplay
-@verbatiminclude examples/websocket.c
-@end smalldisplay
-
 @bye
