diff --git a/chapter01/changelog.xml b/chapter01/changelog.xml
index 89e1a05a7..d23e449f1 100644
--- a/chapter01/changelog.xml
+++ b/chapter01/changelog.xml
@@ -40,7 +40,17 @@
     appropriate for the entry or if needed the entire day's listitem.
     -->
     <listitem>
-      <para>2022-01-20</para>
+      <para>2022-01-29</para>
+      <itemizedlist>
+        <listitem>
+          <para>[bdubbs] - Update to linux-5.16.4. Fixes
+          <ulink url="&lfs-ticket-root;4991">#4991</ulink>.</para>
+        </listitem>
+      </itemizedlist>
+    </listitem>
+
+    <listitem>
+      <para>2022-01-27</para>
       <itemizedlist>
         <listitem>
           <para>[bdubbs] - Update to vim-8.2.4236. Addresses
diff --git a/packages.ent b/packages.ent
index 3db94807e..63f91b46a 100644
--- a/packages.ent
+++ b/packages.ent
@@ -437,12 +437,12 @@
 
 <!ENTITY linux-major-version "5">
 <!ENTITY linux-minor-version "16">
-<!ENTITY linux-patch-version "2">
+<!ENTITY linux-patch-version "4">
 <!--<!ENTITY linux-version "&linux-major-version;.&linux-minor-version;">-->
 <!ENTITY linux-version "&linux-major-version;.&linux-minor-version;.&linux-patch-version;">
-<!ENTITY linux-size "124,536 KB">
+<!ENTITY linux-size "124,547 KB">
 <!ENTITY linux-url "&kernel;linux/kernel/v&linux-major-version;.x/linux-&linux-version;.tar.xz">
-<!ENTITY linux-md5 "fd00badc3b53d42da3d84a7cf6f53f17">
+<!ENTITY linux-md5 "4a6796ff9e020abb3666d40775ab4867">
 <!ENTITY linux-home "https://www.kernel.org/">
 <!-- measured for 5.13.4 / gcc-11.1.0 on x86_64 : minimum is
  allnoconfig rounded down to allow for ongoing cleanups,