diff --git a/html/upgrade.iredmail.0.9.1-0.9.2.html b/html/upgrade.iredmail.0.9.1-0.9.2.html
index 722c3cae..c0873b20 100644
--- a/html/upgrade.iredmail.0.9.1-0.9.2.html
+++ b/html/upgrade.iredmail.0.9.1-0.9.2.html
@@ -17,7 +17,8 @@
 <li><a href="#changelog">ChangeLog</a></li>
 <li><a href="#general-all-backends-should-apply-these-steps">General (All backends should apply these steps)</a><ul>
 <li><a href="#update-etciredmail-release-with-new-iredmail-version-number">Update /etc/iredmail-release with new iRedMail version number</a></li>
-<li><a href="#dont-ban-applicationoctet-stream-dat-files-in-amavisd">Don't ban 'application/octet-stream, dat' files in Amavisd</a></li>
+<li><a href="#rhelcentos-7-update-cluebringer-package-to-avoid-database-connection-failure">[RHEL/CentOS 7] Update Cluebringer package to avoid database connection failure</a></li>
+<li><a href="#rhelcentos-dont-ban-applicationoctet-stream-dat-file-types-in-amavisd">[RHEL/CentOS] Don't ban application/octet-stream, dat file types in Amavisd</a></li>
 <li><a href="#optional-update-one-fail2ban-filter-regular-expressio-to-help-catch-dos-attacks-to-smtp-service">[OPTIONAL] Update one Fail2ban filter regular expressio to help catch DoS attacks to SMTP service</a></li>
 </ul>
 </li>
@@ -45,8 +46,23 @@ so that you can know which version of iRedMail you're running. For example:</p>
 0.9.2
 </code></pre>
 
-<h3 id="dont-ban-applicationoctet-stream-dat-files-in-amavisd">Don't ban 'application/octet-stream, dat' files in Amavisd</h3>
-<p>Note: This is only applicable to RHEL/CentOS.</p>
+<h3 id="rhelcentos-7-update-cluebringer-package-to-avoid-database-connection-failure">[RHEL/CentOS 7] Update Cluebringer package to avoid database connection failure</h3>
+<p>Note: This is applicable to only RHEL/CentOS 7.</p>
+<p>With old Cluebringer RPM package, Cluebringer starts before SQL database starts,
+this causes Cluebringer cannot connect to SQL database, and all your Cluebringer
+settings is not applied at all. Updating Cluebringer package to version
+<code>2.0.14-5</code> fixes this issue.</p>
+<p>How to update package:</p>
+<pre><code># yum clean metadata
+# yum update cluebringer
+# systemctl enable cbpolicyd
+</code></pre>
+
+<p>New package will remove old SysV script <code>/etc/init.d/cbpolicyd</code>, and install
+<code>/usr/lib/systemd/system/cbpolicyd.service</code> for service control. You have to
+manage it (start, stop, restart) with <code>systemctl</code> command.</p>
+<h3 id="rhelcentos-dont-ban-applicationoctet-stream-dat-file-types-in-amavisd">[RHEL/CentOS] Don't ban <code>application/octet-stream, dat</code> file types in Amavisd</h3>
+<p>Note: This is applicable to only RHEL/CentOS.</p>
 <ul>
 <li>Find below lines in Amavisd config file <code>/etc/amavisd/amavisd.conf</code>:</li>
 </ul>
diff --git a/upgrade/0-upgrade.iredmail.0.9.1-0.9.2.md b/upgrade/0-upgrade.iredmail.0.9.1-0.9.2.md
index 4702f69e..2e0368d2 100644
--- a/upgrade/0-upgrade.iredmail.0.9.1-0.9.2.md
+++ b/upgrade/0-upgrade.iredmail.0.9.1-0.9.2.md
@@ -26,9 +26,31 @@ so that you can know which version of iRedMail you're running. For example:
 0.9.2
 ```
 
-### Don't ban 'application/octet-stream, dat' files in Amavisd
+### [RHEL/CentOS 7] Update Cluebringer package to avoid database connection failure
 
-Note: This is only applicable to RHEL/CentOS.
+Note: This is applicable to only RHEL/CentOS 7.
+
+With old Cluebringer RPM package, Cluebringer starts before SQL database starts,
+this causes Cluebringer cannot connect to SQL database, and all your Cluebringer
+settings is not applied at all. Updating Cluebringer package to version
+`2.0.14-5` fixes this issue.
+
+How to update package:
+
+```
+# yum clean metadata
+# yum update cluebringer
+# systemctl enable cbpolicyd
+```
+
+New package will remove old SysV script `/etc/init.d/cbpolicyd`, and install
+`/usr/lib/systemd/system/cbpolicyd.service` for service control. You have to
+manage it (start, stop, restart) with `systemctl` command.
+
+
+### [RHEL/CentOS] Don't ban `application/octet-stream, dat` file types in Amavisd
+
+Note: This is applicable to only RHEL/CentOS.
 
 * Find below lines in Amavisd config file `/etc/amavisd/amavisd.conf`: