diff --git a/en_US/upgrade/0-upgrade.iredmail.0.9.3-0.9.4.md b/en_US/upgrade/0-upgrade.iredmail.0.9.3-0.9.4.md
index 486289a7..9c79a1ca 100644
--- a/en_US/upgrade/0-upgrade.iredmail.0.9.3-0.9.4.md
+++ b/en_US/upgrade/0-upgrade.iredmail.0.9.3-0.9.4.md
@@ -47,6 +47,12 @@ Note: package `rsync` must be installed on your server before upgrading.
 In iRedMail-0.9.3, there's no daily cron job to backup SQL/LDAP databases.
 Please add them manually with command `crontab -e -u root`.
 
+> If you downloaded iRedMail-0.9.3 right after it had been released, the daily
+> cron job which is used to backup SQL/LDAP database is missing. We re-packed
+> iRedMail-0.9.3 with this fix to avoid trouble for users. So if don't have this
+> cron job, please add it by following steps below. If you already have it,
+> it's safe to ignore steps below.
+
 > Notes:
 >
 > * Please make sure the path to backup scripts
diff --git a/html/upgrade.iredmail.0.9.3-0.9.4.html b/html/upgrade.iredmail.0.9.3-0.9.4.html
index 8a9cdbfb..aedebe63 100644
--- a/html/upgrade.iredmail.0.9.3-0.9.4.html
+++ b/html/upgrade.iredmail.0.9.3-0.9.4.html
@@ -62,6 +62,11 @@ latest stable release immediately: <a href="http://trac.roundcube.net/wiki/Howto
 <p>In iRedMail-0.9.3, there's no daily cron job to backup SQL/LDAP databases.
 Please add them manually with command <code>crontab -e -u root</code>.</p>
 <blockquote>
+<p>If you downloaded iRedMail-0.9.3 right after it had been released, the daily
+cron job which is used to backup SQL/LDAP database is missing. We re-packed
+iRedMail-0.9.3 with this fix to avoid trouble for users. So if don't have this
+cron job, please add it by following steps below. If you already have it,
+it's safe to ignore steps below.</p>
 <p>Notes:</p>
 <ul>
 <li>