diff --git a/en_US/upgrade/0-upgrade.iredmail.0.9.8-0.9.9.md b/en_US/upgrade/0-upgrade.iredmail.0.9.8-0.9.9.md
index c39cc638..9241a52b 100644
--- a/en_US/upgrade/0-upgrade.iredmail.0.9.8-0.9.9.md
+++ b/en_US/upgrade/0-upgrade.iredmail.0.9.8-0.9.9.md
@@ -468,7 +468,7 @@ user_query = SELECT \
     ...
 ```
 
-Restart Dovecot service is required.
+Restarting Dovecot service is required.
 
 For more details about changing mailbox format, please check our tutorial:
 [Change mailbox format](./change.mailbox.format.html).
@@ -495,7 +495,7 @@ user_query = SELECT \
             ...
 ```
 
-Restart Dovecot service is required.
+Restarting Dovecot service is required.
 
 For more details about changing mailbox format, please check our tutorial:
 [Change mailbox format](./change.mailbox.format.html).
diff --git a/html/upgrade.iredmail.0.9.8-0.9.9.html b/html/upgrade.iredmail.0.9.8-0.9.9.html
index 51d47479..88ca197d 100644
--- a/html/upgrade.iredmail.0.9.8-0.9.9.html
+++ b/html/upgrade.iredmail.0.9.8-0.9.9.html
@@ -458,7 +458,7 @@ below:</p>
     ...
 </code></pre>
 
-<p>Restart Dovecot service is required.</p>
+<p>Restarting Dovecot service is required.</p>
 <p>For more details about changing mailbox format, please check our tutorial:
 <a href="./change.mailbox.format.html">Change mailbox format</a>.</p>
 <h4 id="postgresql-9x-and-later-releases">PostgreSQL 9.x and later releases</h4>
@@ -478,7 +478,7 @@ below:</p>
             ...
 </code></pre>
 
-<p>Restart Dovecot service is required.</p>
+<p>Restarting Dovecot service is required.</p>
 <p>For more details about changing mailbox format, please check our tutorial:
 <a href="./change.mailbox.format.html">Change mailbox format</a>.</p><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="https://www.iredmail.org/contact.html">contact us</a> to fix it.</p>