diff --git a/introduction/welcome/changelog.xml b/introduction/welcome/changelog.xml
index ea1f148a45..81859400b6 100644
--- a/introduction/welcome/changelog.xml
+++ b/introduction/welcome/changelog.xml
@@ -45,6 +45,10 @@
     <listitem>
       <para>June 28th, 2017</para>
       <itemizedlist>
+        <listitem>
+          <para>[pierre] - Update to unbound-1.6.4. Fixes
+          <ulink url="&blfs-ticket-root;9415">#9415</ulink>.</para>
+        </listitem>
         <listitem>
           <para>[pierre] - Reinstate firebird-sdbc in libreoffice.</para>
         </listitem>
diff --git a/packages.ent b/packages.ent
index 640e99090f..3fe4bc16db 100644
--- a/packages.ent
+++ b/packages.ent
@@ -499,7 +499,7 @@
 <!-- Chapter 23 -->
 <!ENTITY openldap-version             "2.4.45">
 <!ENTITY soprano-version              "2.9.4">
-<!ENTITY unbound-version              "1.6.3">
+<!ENTITY unbound-version              "1.6.4">
 <!ENTITY virtuoso-version             "6.1.8">
 <!ENTITY xinetd-version               "2.3.15">
 
diff --git a/server/other/unbound.xml b/server/other/unbound.xml
index 90970a3671..e8845b6162 100644
--- a/server/other/unbound.xml
+++ b/server/other/unbound.xml
@@ -6,9 +6,9 @@
 
   <!ENTITY unbound-download-http "http://www.unbound.net/downloads/unbound-&unbound-version;.tar.gz">
   <!ENTITY unbound-download-ftp  " ">
-  <!ENTITY unbound-md5sum        "d964d04c8d2b25f3271ac60fc630b654">
-  <!ENTITY unbound-size          "5.1 MB">
-  <!ENTITY unbound-buildsize     "53 MB (with tests, add 76 MB for documentation)">
+  <!ENTITY unbound-md5sum        "ab6f7c07610907f1d87191c9ac2db87a">
+  <!ENTITY unbound-size          "5.2 MB">
+  <!ENTITY unbound-buildsize     "54 MB (with tests, add 80 MB for documentation)">
   <!ENTITY unbound-time          "0.8 SBU (with tests)">
 ]>