diff --git a/module/common/model.php b/module/common/model.php
index 00855afdf1..36e148258c 100644
--- a/module/common/model.php
+++ b/module/common/model.php
@@ -320,7 +320,7 @@ class commonModel extends model
         echo '<li>' . html::a($lang->manualUrl, $lang->manual, '_blank', "class='open-help-tab'") . '</li>';
         echo '<li>' . html::a(helper::createLink('misc', 'changeLog'), $lang->changeLog, '', "class='iframe' data-width='800' data-headerless='true' data-backdrop='true' data-keyboard='true'") . '</li>';
         echo "</ul></li>\n";
-        echo '<li>' . html::a(helper::createLink('misc', 'about'), $lang->aboutZenTao, '', "class='about iframe' data-width='900' data-headerless='true' data-backdrop='true' data-keyboard='true' data-class='modal-about'") . '</li>';
+        echo '<li>' . html::a(helper::createLink('misc', 'about'), $lang->aboutZenTao, '', "class='about iframe' data-width='950' data-headerless='true' data-backdrop='true' data-keyboard='true' data-class='modal-about'") . '</li>';
     }
 
     /**