diff --git a/en_US/upgrade/0-upgrade.debian.8-9.md b/en_US/upgrade/0-upgrade.debian.8-9.md
new file mode 100644
index 00000000..6149392b
--- /dev/null
+++ b/en_US/upgrade/0-upgrade.debian.8-9.md
@@ -0,0 +1,11 @@
+# Fixes you need after upgrading Debian from 8 to 9
+
+[TOC]
+
+## Dovecot
+
+Please remove `!SSLv2` from parameter `ssl_protocols`, and restart Dovecot service:
+
+```
+ssl_protocols = !SSLv3
+```
diff --git a/en_US/upgrade/0-upgrade.ubuntu.14.04-16.04.md b/en_US/upgrade/0-upgrade.ubuntu.14.04-16.04.md
index 5858d953..c6685f0b 100644
--- a/en_US/upgrade/0-upgrade.ubuntu.14.04-16.04.md
+++ b/en_US/upgrade/0-upgrade.ubuntu.14.04-16.04.md
@@ -1,4 +1,4 @@
-# Fixes you need after upgrading Ubuntu to 16.04 from 14.04
+# Fixes you need after upgrading Ubuntu from 14.04 to 16.04
 
 [TOC]
 
diff --git a/html/upgrade.debian.8-9.html b/html/upgrade.debian.8-9.html
new file mode 100644
index 00000000..a858a40c
--- /dev/null
+++ b/html/upgrade.debian.8-9.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+        <title>Fixes you need after upgrading Debian from 8 to 9</title>
+        <link rel="stylesheet" type="text/css" href="./css/markdown.css" />
+    </head>
+    <body>
+    
+    <div id="navigation">
+    <a href="/index.html" target="_blank">
+        <img alt="iRedMail web site"
+             src="./images/logo-iredmail.png"
+             style="vertical-align: middle; height: 30px;"
+             />&nbsp;
+        <span>iRedMail</span>
+    </a>
+    &nbsp;&nbsp;//&nbsp;&nbsp;<a href="./index.html">Document Index</a></div><h1 id="fixes-you-need-after-upgrading-debian-from-8-to-9">Fixes you need after upgrading Debian from 8 to 9</h1>
+<div class="toc">
+<ul>
+<li><a href="#fixes-you-need-after-upgrading-debian-from-8-to-9">Fixes you need after upgrading Debian from 8 to 9</a><ul>
+<li><a href="#dovecot">Dovecot</a></li>
+</ul>
+</li>
+</ul>
+</div>
+<h2 id="dovecot">Dovecot</h2>
+<p>Please remove <code>!SSLv2</code> from parameter <code>ssl_protocols</code>, and restart Dovecot service:</p>
+<pre><code>ssl_protocols = !SSLv3
+</code></pre><div class="footer">
+    <p style="text-align: center; color: grey;">All documents are available in <a href="https://bitbucket.org/zhb/iredmail-docs/src">BitBucket repository</a>, and published under <a href="http://creativecommons.org/licenses/by-nd/3.0/us/" target="_blank">Creative Commons</a> license. You can <a href="https://bitbucket.org/zhb/iredmail-docs/get/tip.tar.bz2">download the latest version</a> for offline reading. If you found something wrong, please do <a href="http://www.iredmail.org/contact.html">contact us</a> to fix it.</p>
+</div>
+<script type="text/javascript">
+  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
+  (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
+  m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
+  })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
+
+  ga('create', 'UA-3293801-21', 'auto');
+  ga('send', 'pageview');
+</script>
+</body></html>
\ No newline at end of file
diff --git a/html/upgrade.ubuntu.14.04-16.04.html b/html/upgrade.ubuntu.14.04-16.04.html
index c8eb9e3f..6c03f5ff 100644
--- a/html/upgrade.ubuntu.14.04-16.04.html
+++ b/html/upgrade.ubuntu.14.04-16.04.html
@@ -2,7 +2,7 @@
 <html>
     <head>
         <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
-        <title>Fixes you need after upgrading Ubuntu to 16.04 from 14.04</title>
+        <title>Fixes you need after upgrading Ubuntu from 14.04 to 16.04</title>
         <link rel="stylesheet" type="text/css" href="./css/markdown.css" />
     </head>
     <body>
@@ -15,10 +15,10 @@
              />&nbsp;
         <span>iRedMail</span>
     </a>
-    &nbsp;&nbsp;//&nbsp;&nbsp;<a href="./index.html">Document Index</a></div><h1 id="fixes-you-need-after-upgrading-ubuntu-to-1604-from-1404">Fixes you need after upgrading Ubuntu to 16.04 from 14.04</h1>
+    &nbsp;&nbsp;//&nbsp;&nbsp;<a href="./index.html">Document Index</a></div><h1 id="fixes-you-need-after-upgrading-ubuntu-from-1404-to-1604">Fixes you need after upgrading Ubuntu from 14.04 to 16.04</h1>
 <div class="toc">
 <ul>
-<li><a href="#fixes-you-need-after-upgrading-ubuntu-to-1604-from-1404">Fixes you need after upgrading Ubuntu to 16.04 from 14.04</a><ul>
+<li><a href="#fixes-you-need-after-upgrading-ubuntu-from-1404-to-1604">Fixes you need after upgrading Ubuntu from 14.04 to 16.04</a><ul>
 <li><a href="#apache">Apache</a></li>
 <li><a href="#postfix">Postfix</a></li>
 <li><a href="#iredapd">iRedAPD</a></li>
