diff --git a/chapter01/changelog.xml b/chapter01/changelog.xml
index 65fec55e2..3358b97a2 100644
--- a/chapter01/changelog.xml
+++ b/chapter01/changelog.xml
@@ -52,11 +52,11 @@
           <ulink url="&lfs-ticket-root;4355">#4355</ulink>.</para>
         </listitem>
         <listitem revision="systemd">
-          <para>[dj] - Added systemd-239-meson-0.40.0_fixes-1.patch to resolve
+          <para>[dj] - Added systemd-239-meson-0.48.0_fixes-1.patch to resolve
           build errors with meson.</para>
         </listitem>
         <listitem>
-          <para>[dj] - Update to meson-0.40.0. Fixes
+          <para>[dj] - Update to meson-0.48.0. Fixes
           <ulink url="&lfs-ticket-root;4351">#4351</ulink>.</para>
         </listitem>
         <listitem>
diff --git a/chapter06/systemd.xml b/chapter06/systemd.xml
index c987066d4..e562f4ac1 100644
--- a/chapter06/systemd.xml
+++ b/chapter06/systemd.xml
@@ -63,9 +63,9 @@ done</userinput></screen>
 
 <screen><userinput remap="pre">patch -Np1 -i ../systemd-&systemd-version;-glibc_statx_fix-1.patch</userinput></screen>
 
-    <para>Apply a patch to fix a build failure with meson-0.40.0:</para>
+    <para>Apply a patch to fix a build failure with meson-0.48.0:</para>
 
-<screen><userinput remap="pre">patch -Np1 -i ../systemd-&systemd-version;-meson-0.40.0_fixes-1.patch</userinput></screen>
+<screen><userinput remap="pre">patch -Np1 -i ../systemd-&systemd-version;-meson-0.48.0_fixes-1.patch</userinput></screen>
 
     <para>Remove an unneeded group,
     <systemitem class="groupname">render</systemitem>, from the default udev
diff --git a/packages.ent b/packages.ent
index d7f1cffaf..01db526d2 100644
--- a/packages.ent
+++ b/packages.ent
@@ -90,6 +90,16 @@
 <!ENTITY bzip2-ch6-du "2.3 MB">
 <!ENTITY bzip2-ch6-sbu "less than 0.1 SBU">
 
+<!ENTITY ref5-version "&version;">
+<!ENTITY ref5-size "REF5-SUM KB">
+<!ENTITY ref5-url "&anduin-sources;/reference-files/chapter5-files-&version;.ref">
+<!ENTITY ref5-md5 "REF5-MD5SUM">
+
+<!ENTITY ref6-version "&version;">
+<!ENTITY ref6-size "REF6-SUM KB">
+<!ENTITY ref6-url "&anduin-sources;/reference-files/chapter6-files-&version;.ref">
+<!ENTITY ref6-md5 "REF6-MD5SUM">
+
 <!ENTITY check-version "0.12.0">
 <!ENTITY check-size "747 KB">
 <!ENTITY check-url "&github;/libcheck/check/releases/download/&check-version;/check-&check-version;.tar.gz">
diff --git a/patches.ent b/patches.ent
index 78f132e20..5e0fc3df3 100644
--- a/patches.ent
+++ b/patches.ent
@@ -67,7 +67,7 @@
 <!ENTITY systemd-glibc-patch-md5 "a44057d6a6ca69760bafc126458d89e5">
 <!ENTITY systemd-glibc-patch-size "4 KB">
 
-<!ENTITY systemd-meson-patch "systemd-&systemd-version;-meson-0.40.0_fixes-1.patch">
+<!ENTITY systemd-meson-patch "systemd-&systemd-version;-meson-0.48.0_fixes-1.patch">
 <!ENTITY systemd-meson-patch-md5 "0e12e0722bd6bb84e8a4ec4de8979722">
 <!ENTITY systemd-meson-patch-size "4 KB">