diff --git a/reference/gmp/gmp.xml b/reference/gmp/gmp.xml
index cc59d1c830..1db3c7c0dc 100644
--- a/reference/gmp/gmp.xml
+++ b/reference/gmp/gmp.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
-<!-- EN-Revision: 62126c55f1c6ed444043e7272c4f9e233818a44b Maintainer: takagi Status: ready -->
+<!-- EN-Revision: 527966eb19d4bbf5f02d0fe82dcb57e417082e25 Maintainer: takagi Status: ready -->
 
 <reference xml:id="class.gmp" role="class" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
 
@@ -29,6 +29,7 @@
 
    <classsynopsis class="class">
     <ooclass>
+     <modifier>final</modifier>
      <classname>GMP</classname>
     </ooclass>
 
@@ -41,6 +42,28 @@
     </xi:include>
    </classsynopsis>
   </section>
+
+  <section role="changelog">
+   &reftitle.changelog;
+   <informaltable>
+    <tgroup cols="2">
+     <thead>
+      <row>
+       <entry>&Version;</entry>
+       <entry>&Description;</entry>
+      </row>
+     </thead>
+     <tbody>
+      <row>
+       <entry>8.4.0</entry>
+       <entry>
+        <classname>GMP</classname> は <modifier>final</modifier> として定義されました。
+       </entry>
+      </row>
+     </tbody>
+    </tgroup>
+   </informaltable>
+  </section>
  </partintro>
 
  &reference.gmp.entities.gmp;