diff --git a/chapter01/changelog.xml b/chapter01/changelog.xml
index 5a8a8cac4..386dfcff7 100644
--- a/chapter01/changelog.xml
+++ b/chapter01/changelog.xml
@@ -39,6 +39,9 @@
     <listitem>
       <para>2006-07-31</para>
       <itemizedlist>
+        <listitem>
+          <para>[matthew] - Upgrade to m4-1.4.5.</para>
+        </listitem>
         <listitem>
           <para>[matthew] - Upgrade to gettext-0.15.</para>
         </listitem>
diff --git a/chapter01/whatsnew.xml b/chapter01/whatsnew.xml
index aa997a70a..c3ec3471a 100644
--- a/chapter01/whatsnew.xml
+++ b/chapter01/whatsnew.xml
@@ -118,9 +118,9 @@
     <!--<listitem>
       <para>Linux-Libc-Headers &linux-libc-headers-version;</para>
     </listitem>-->
-    <!--<listitem>
+    <listitem>
       <para>M4 &m4-version;</para>
-    </listitem>-->
+    </listitem>
     <!--<listitem>
       <para>Make &make-version;</para>
     </listitem>-->
diff --git a/packages.ent b/packages.ent
index e29381fad..dd288ba4e 100644
--- a/packages.ent
+++ b/packages.ent
@@ -313,14 +313,14 @@
 <!ENTITY linux-libc-headers-ch6-du "27 MB">
 <!ENTITY linux-libc-headers-ch6-sbu "less than 0.1 SBU">
 
-<!ENTITY m4-version "1.4.4">
-<!ENTITY m4-size "376 KB">
+<!ENTITY m4-version "1.4.5">
+<!ENTITY m4-size "479 KB">
 <!ENTITY m4-url "&gnu;m4/m4-&m4-version;.tar.gz">
-<!ENTITY m4-md5 "8d1d64dbecf1494690a0f3ba8db4482a">
+<!ENTITY m4-md5 "8bcd8244d5bed9f8e2d5f05ad693b8b4">
 <!ENTITY m4-home "&gnu-software;m4/">
-<!ENTITY m4-ch5-du "3 MB">
+<!ENTITY m4-ch5-du "4.4 MB">
 <!ENTITY m4-ch5-sbu "less than 0.1 SBU">
-<!ENTITY m4-ch6-du "3 MB">
+<!ENTITY m4-ch6-du "4.4 MB">
 <!ENTITY m4-ch6-sbu "less than 0.1 SBU">
 
 <!ENTITY make-version "3.80">