diff --git a/doc/appendix-release-notes.sgml b/doc/appendix-release-notes.sgml
index 6f39b651..5a220cfe 100644
--- a/doc/appendix-release-notes.sgml
+++ b/doc/appendix-release-notes.sgml
@@ -34,7 +34,7 @@
           </listitem>
           <listitem>
             <para>
-              Execute <command>ALTER EXTENSION repmgr UPGRADE</command>
+              Execute <command>ALTER EXTENSION repmgr UPDATE</command>
               on the primary server in the database where &repmgr; is installed.
             </para>
           </listitem>