diff --git a/introduction/welcome/changelog.xml b/introduction/welcome/changelog.xml
index e09d5ce9c2..5b21ae4d9b 100644
--- a/introduction/welcome/changelog.xml
+++ b/introduction/welcome/changelog.xml
@@ -42,6 +42,10 @@
     <listitem>
       <para>February 2nd, 2024</para>
       <itemizedlist>
+        <listitem>
+          <para>[renodr] - Update to sendmail-8.18.1 (Security Update). Fixes
+          <ulink url="&blfs-ticket-root;19219">#19219</ulink>.</para>
+        </listitem>
         <listitem>
           <para>[renodr] - Update to fetchmail-6.4.38. Fixes
           <ulink url="&blfs-ticket-root;19218">#19218</ulink>.</para>
diff --git a/packages.ent b/packages.ent
index 3224962f43..ecf3ff088c 100644
--- a/packages.ent
+++ b/packages.ent
@@ -748,7 +748,7 @@
 
 <!ENTITY exim-version                 "4.97.1">
 <!ENTITY postfix-version              "3.8.5">
-<!ENTITY sendmail-version             "8.17.2">
+<!ENTITY sendmail-version             "8.18.1">
 
 <!-- Chapter 22 -->
 <!ENTITY db-version                   "5.3.28">
diff --git a/server/mail/sendmail.xml b/server/mail/sendmail.xml
index 7fc122f381..9a49e053bd 100644
--- a/server/mail/sendmail.xml
+++ b/server/mail/sendmail.xml
@@ -6,9 +6,9 @@
 
   <!ENTITY sendmail-download-http "https://ftp.sendmail.org/sendmail.&sendmail-version;.tar.gz">
   <!ENTITY sendmail-download-ftp  " ">
-  <!ENTITY sendmail-md5sum        "eb21e7c8a1d2a69a4597e9ce6b1cb3d5">
-  <!ENTITY sendmail-size          "2.2 MB">
-  <!ENTITY sendmail-buildsize     "18 MB">
+  <!ENTITY sendmail-md5sum        "b6b332295b5779036d4c9246f96f673c">
+  <!ENTITY sendmail-size          "2.3 MB">
+  <!ENTITY sendmail-buildsize     "21 MB">
   <!ENTITY sendmail-time          "0.1 SBU">
 ]>