diff --git a/chapter01/changelog.xml b/chapter01/changelog.xml
index 2b8ffcacb..1123d28a2 100644
--- a/chapter01/changelog.xml
+++ b/chapter01/changelog.xml
@@ -38,6 +38,9 @@
     <listitem>
       <para>2006-10-02</para>
       <itemizedlist>
+        <listitem>
+          <para>[matthew] - Upgrade to Psmisc-22.3.</para>
+        </listitem>
         <listitem>
           <para>[matthew] - Upgrade to M4-1.4.7.</para>
         </listitem>
diff --git a/chapter01/whatsnew.xml b/chapter01/whatsnew.xml
index b2ae9a0ad..0871383c8 100644
--- a/chapter01/whatsnew.xml
+++ b/chapter01/whatsnew.xml
@@ -148,9 +148,9 @@
     <listitem>
       <para>Procps &procps-version;</para>
     </listitem>
-    <!--<listitem>
+    <listitem>
       <para>Psmisc &psmisc-version;</para>
-    </listitem>-->
+    </listitem>
     <!--<listitem>
       <para>Readline &readline-version;</para>
     </listitem>-->
diff --git a/packages.ent b/packages.ent
index 0dab705e7..9525cae97 100644
--- a/packages.ent
+++ b/packages.ent
@@ -407,10 +407,10 @@
 <!ENTITY procps-ch6-du "2.3 MB">
 <!ENTITY procps-ch6-sbu "0.1 SBU">
 
-<!ENTITY psmisc-version "22.2">
-<!ENTITY psmisc-size "239 KB">
+<!ENTITY psmisc-version "22.3">
+<!ENTITY psmisc-size "251 KB">
 <!ENTITY psmisc-url "&sourceforge;psmisc/psmisc-&psmisc-version;.tar.gz?download">
-<!ENTITY psmisc-md5 "77737c817a40ef2c160a7194b5b64337">
+<!ENTITY psmisc-md5 "0c44b995d068a221daf35d23e13db419">
 <!ENTITY psmisc-home "http://psmisc.sourceforge.net/">
 <!ENTITY psmisc-ch6-du "2.2 MB">
 <!ENTITY psmisc-ch6-sbu "less than 0.1 SBU">