diff --git a/application/twigextension.class.inc.php b/application/twigextension.class.inc.php
index 27525567f..753b2fcdd 100644
--- a/application/twigextension.class.inc.php
+++ b/application/twigextension.class.inc.php
@@ -11,6 +11,13 @@ use Twig_SimpleFilter;
 use Twig_SimpleFunction;
 use utils;
 
+/**
+ * Class TwigExtension
+ *
+ * @author Guillaume Lajarige <guillaume.lajarige@combodo.com>
+ * @package Combodo\iTop
+ * @deprecated 3.1.0 N°4034
+ */
 class TwigExtension
 {
 	/**
diff --git a/datamodels/2.x/itop-portal-base/portal/src/Twig/AppExtension.php b/datamodels/2.x/itop-portal-base/portal/src/Twig/AppExtension.php
index 807d5fbf1..ce084e6a7 100644
--- a/datamodels/2.x/itop-portal-base/portal/src/Twig/AppExtension.php
+++ b/datamodels/2.x/itop-portal-base/portal/src/Twig/AppExtension.php
@@ -35,6 +35,7 @@ use MetaModel;
  * @package Combodo\iTop\Portal\Twig
  * @since   2.7.0
  * @author  Bruno Da Silva <bruno.dasilva@combodo.com>
+ * @deprected 3.1.0 N°4287
  */
 class AppExtension extends AbstractExtension
 {