diff --git a/html/upgrade.iredmail.0.9.0-0.9.1.html b/html/upgrade.iredmail.0.9.0-0.9.1.html
index c6c8c175..59c20a8e 100644
--- a/html/upgrade.iredmail.0.9.0-0.9.1.html
+++ b/html/upgrade.iredmail.0.9.0-0.9.1.html
@@ -194,7 +194,7 @@ $banned_namepath_re = new_RE(
 
 <p>Restarting Amavisd service is required.</p>
 <h3 id="fixed-amavisd-cannot-detect-exe-file-in-rar-compressed-attachment">Fixed: Amavisd cannot detect <code>.exe</code> file in rar compressed attachment.</h3>
-<p>Note: This fix is applicable to RHEL/CentOS, Debian and Ubuntu.</p>
+<p>Note: This fix is applicable to RHEL/CentOS and Ubuntu.</p>
 <ul>
 <li>On RHEL/CentOS, iRedMail doesn't install <code>unrar</code>.</li>
 <li>On Debian/Ubuntu, iRedMail installs package <code>unrar-free</code> as unarchiver to
@@ -207,9 +207,10 @@ $banned_namepath_re = new_RE(
 # service amavisd restart
 </code></pre>
 
-<p>Steps to fix this issue on Debian/Ubuntu:</p>
+<hr />
+<p>Steps to fix this issue on Ubuntu:</p>
 <ul>
-<li>Delete package <code>unrar-free</code>, and install package <code>unrar</code>.</li>
+<li>Delete package <code>unrar-free</code>, install package <code>unrar</code>.</li>
 </ul>
 <pre><code># apt-get remove --purge unrar-free
 # apt-get install unrar
diff --git a/upgrade/0-upgrade.iredmail.0.9.0-0.9.1.md b/upgrade/0-upgrade.iredmail.0.9.0-0.9.1.md
index a19212c1..728342ce 100644
--- a/upgrade/0-upgrade.iredmail.0.9.0-0.9.1.md
+++ b/upgrade/0-upgrade.iredmail.0.9.0-0.9.1.md
@@ -177,9 +177,22 @@ Steps to fix this issue on RHEL/CentOS:
 # service amavisd restart
 ```
 
-Steps to fix this issue on Debian/Ubuntu:
+----
 
-* Delete package `unrar-free`, and install package `unrar`.
+Steps to fix this issue on Debian:
+
+* Install package `unrar-free`, restart Amavisd service.
+
+```
+# apt-get install unrar-free
+# service amavis restart
+```
+
+----
+
+Steps to fix this issue on Ubuntu:
+
+* Delete package `unrar-free`, install package `unrar`.
 
 ```
 # apt-get remove --purge unrar-free