diff --git a/introduction/welcome/changelog.xml b/introduction/welcome/changelog.xml
index 461c11ae23..3c5bb0b3a7 100644
--- a/introduction/welcome/changelog.xml
+++ b/introduction/welcome/changelog.xml
@@ -44,6 +44,10 @@
     <listitem>
       <para>May 18th, 2021</para>
       <itemizedlist>
+        <listitem>
+          <para>[bdubbs] - Update to ;ibX11-1.7.1 (xorg library; Security Release). Fixes
+          <ulink url="&blfs-ticket-root;15056">#15056</ulink>.</para>
+        </listitem>
         <listitem>
           <para>[bdubbs] - Update to unrar-6.0.6. Fixes
           <ulink url="&blfs-ticket-root;15053">#15053</ulink>.</para>
diff --git a/x/installing/x7lib.xml b/x/installing/x7lib.xml
index c07976d6c6..fdf2723457 100644
--- a/x/installing/x7lib.xml
+++ b/x/installing/x7lib.xml
@@ -13,8 +13,8 @@
   <!ENTITY xtrans-version                  "1.4.0">
   <!ENTITY xtrans-md5sum                   "ce2fb8100c6647ee81451ebe388b17ad">
 
-  <!ENTITY libX11-version                  "1.7.0">
-  <!ENTITY libX11-md5sum                   "f46572566e2cec801609d25f735285b7">
+  <!ENTITY libX11-version                  "1.7.1">
+  <!ENTITY libX11-md5sum                   "4795a742b3127c1358ce759f76ab5318">
 
   <!ENTITY libXext-version                 "1.3.4">
   <!ENTITY libXext-md5sum                  "f5b48bb76ba327cd2a8dc7a383532a95">