diff --git a/en_US/howto/restrict.mail.user.to.login.from.specified.ip.or.networks.md b/en_US/howto/restrict.mail.user.to.login.from.specified.ip.or.networks.md
index 8ba14248..35896249 100644
--- a/en_US/howto/restrict.mail.user.to.login.from.specified.ip.or.networks.md
+++ b/en_US/howto/restrict.mail.user.to.login.from.specified.ip.or.networks.md
@@ -35,6 +35,6 @@ To remove this restriction, just remove attribute `allowNets` for this user.
 # References
 
 * This feature is implemented in iRedMail-0.9.1, and mentioned in iRedMail
-  [upgrade tutorial for iRedMail-0.9.0](./upgrade.iredmail.0.9.0-0.9.1.html]
+  [upgrade tutorial for iRedMail-0.9.0](./upgrade.iredmail.0.9.0-0.9.1.html)
 
 * Dovecot document: [AllowNets](http://wiki2.dovecot.org/PasswordDatabase/ExtraFields/AllowNets)
diff --git a/html/restrict.mail.user.to.login.from.specified.ip.or.networks.html b/html/restrict.mail.user.to.login.from.specified.ip.or.networks.html
index 7c32e9e6..07b0395c 100644
--- a/html/restrict.mail.user.to.login.from.specified.ip.or.networks.html
+++ b/html/restrict.mail.user.to.login.from.specified.ip.or.networks.html
@@ -37,7 +37,7 @@ not empty string.</p>
 <ul>
 <li>
 <p>This feature is implemented in iRedMail-0.9.1, and mentioned in iRedMail
-  [upgrade tutorial for iRedMail-0.9.0](./upgrade.iredmail.0.9.0-0.9.1.html]</p>
+  <a href="./upgrade.iredmail.0.9.0-0.9.1.html">upgrade tutorial for iRedMail-0.9.0</a></p>
 </li>
 <li>
 <p>Dovecot document: <a href="http://wiki2.dovecot.org/PasswordDatabase/ExtraFields/AllowNets">AllowNets</a></p>