diff --git a/csug/csug.stex b/csug/csug.stex
index 135be3fa8..697f5e056 100644
--- a/csug/csug.stex
+++ b/csug/csug.stex
@@ -77,7 +77,7 @@
 \ifhtml
 \def\copyrightnotice{\raw{<hr class=copyright align=left>
 <p>
-<a class=plain href="index.html">Chez Scheme Version 9 User's Guide</a><br>
+<a class=plain href="index.html">Chez Scheme Version 10 User's Guide</a><br>
 Copyright &copy; 2023 Cisco Systems, Inc.<br>
 Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License Version 2.0</a>
 (<a class=plain href="canned/copyright.html">full copyright notice.</a>).</br>
@@ -85,7 +85,7 @@ Revised} \revisiondate\raw{ for }\CSVersion\raw{<br>
 <a class=plain href="canned/about.html">about this book</a>
 </tr></table>
 }}
-\documenttitle[csug.css]{Chez Scheme Version 9 User's Guide}
+\documenttitle[csug.css]{Chez Scheme Version 10 User's Guide}
 \fi
 
 \newcommand{\ChezScheme}{\textsl{Chez~Scheme}}
@@ -121,7 +121,7 @@ Revised} \revisiondate\raw{ for }\CSVersion\raw{<br>
 \ifhtml
 \raw{\raw{<table><tr>
 <td><img src="canned/cisco-logo.png"><br></td>
-<td style="padding-left: 2em"><span class=title>Chez Scheme Version 9<br>User's Guide</span></td>
+<td style="padding-left: 2em"><span class=title>Chez Scheme Version 10<br>User's Guide</span></td>
 </tr></table>}}
 \fi