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 16c19f63..26e6836d 100644
--- a/html/upgrade.iredmail.0.9.0-0.9.1.html
+++ b/html/upgrade.iredmail.0.9.0-0.9.1.html
@@ -93,6 +93,9 @@
 <p>After you have additional packages installed, please follow Roundcube official
 tutorial to upgrade Roundcube webmail to the latest stable release:
 <a href="http://trac.roundcube.net/wiki/Howto_Upgrade">How to upgrade Roundcube</a></p>
+<p>Note: it's recommended to download the <code>Complete</code> edition (e.g.
+<code>roundcubemail-1.1.0-complete.tar.gz</code> instead of <code>Dependent</code> edition (e.g.
+<code>roundcubemail-1.1.0.tar.gz</code>).</p>
 <h3 id="fixed-return-receipt-response-rejected-by-iredapd-plugin-reject_null_sender">Fixed: return receipt response rejected by iRedAPD plugin <code>reject_null_sender</code></h3>
 <p>Note: this is applicable if you want to keep iRedAPD plugin <code>reject_null_sender</code>
 but still able to send return receipt with Roundcube webmail.</p>
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 5dd09d88..f2b6124c 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
@@ -56,6 +56,10 @@ After you have additional packages installed, please follow Roundcube official
 tutorial to upgrade Roundcube webmail to the latest stable release:
 [How to upgrade Roundcube](http://trac.roundcube.net/wiki/Howto_Upgrade)
 
+Note: it's recommended to download the `Complete` edition (e.g.
+`roundcubemail-1.1.0-complete.tar.gz` instead of `Dependent` edition (e.g.
+`roundcubemail-1.1.0.tar.gz`).
+
 ### Fixed: return receipt response rejected by iRedAPD plugin `reject_null_sender`
 
 Note: this is applicable if you want to keep iRedAPD plugin `reject_null_sender`