diff --git a/documentation/installation_guide.html b/documentation/installation_guide.html
index edb21aeb7f..50d61b97fd 100644
--- a/documentation/installation_guide.html
+++ b/documentation/installation_guide.html
@@ -299,7 +299,7 @@ date.timezone = 'America/New_York'
 
 <hr />
 <h2><a name="3._Upgrade_from_a_previous_version_of"></a>3. Upgrade from a 
-previous version of Chamilo LMS (1.*) or Dok€os (<2.0)</h2>
+previous version of Chamilo LMS (1.*) or Dok€os (&lt;2.0)</h2>
 Before upgrading, we <b>heavily</b> recommend you do a full backup of the previous
 Chamilo or Dok€os directories and databases. If you are unsure how to achieve this
 please ask your hosting provider for advice.<br />
diff --git a/documentation/optimization.html b/documentation/optimization.html
index f66c91f02c..a9671859dc 100644
--- a/documentation/optimization.html
+++ b/documentation/optimization.html
@@ -9,7 +9,7 @@
 <body>
     
 <div class="container">
-<h1>Chamilo 1.8.8.4 : Optimization Guide</h1>
+<h1>Chamilo : Optimization Guide</h1>
 
 <a href="index.html">Documentation</a> &gt; Optimization Guide
 
