diff --git a/controller/Main.php b/controller/Main.php
index 1d3311d..e076ec8 100644
--- a/controller/Main.php
+++ b/controller/Main.php
@@ -38,13 +38,6 @@
  */
 class Main extends tao_actions_CommonModule {
 
-    /**
-     * initialize the Controller.
-     */
-    public function __construct(){
-        parent::__construct();
-    }
-
     /**
      * @return PlatformThemingService
      */
@@ -57,7 +50,6 @@ protected function getPlatformService(){
      */
     public function index() {
 
-
         $themingConfig = $this->getPlatformService()->retrieveThemingConfig();
 
         $values = array('themingConfig' => $themingConfig);
diff --git a/controller/ThemeForm.php b/controller/ThemeForm.php
index 23622aa..8069d03 100644
--- a/controller/ThemeForm.php
+++ b/controller/ThemeForm.php
@@ -21,6 +21,7 @@
 
 namespace oat\taoThemingPlatform\controller;
 
+use oat\tao\model\routing\AnnotationReader\security;
 use oat\taoThemingPlatform\model\PlatformThemingConfig;
 
 /**
@@ -34,9 +35,13 @@ class ThemeForm
     extends \tao_helpers_form_FormContainer
 {
 
+    /**
+     * ThemeForm constructor.
+     * @param array $options
+     * @security("hide")
+     */
     public function __construct($options = array())
     {
-
         parent::__construct(array(), $options);
 
     }
diff --git a/manifest.php b/manifest.php
index 44fe294..2d5163d 100644
--- a/manifest.php
+++ b/manifest.php
@@ -23,10 +23,10 @@
 	'label' => 'Platform Theming',
 	'description' => '',
     'license' => 'GPL-2.0',
-    'version' => '3.0.0',
+    'version' => '4.0.0',
 	'author' => 'Open Assessment Technologies SA',
 	'requires' => array(
-        'tao' => '>=21.0.0'
+        'tao' => '>=27.2.0'
     ),
 	'managementRole' => 'http://www.tao.lu/Ontologies/generis.rdf#taoThemingPlatformManager',
     'acl' => array(
diff --git a/scripts/update/Updater.php b/scripts/update/Updater.php
index ca11d82..6629f41 100644
--- a/scripts/update/Updater.php
+++ b/scripts/update/Updater.php
@@ -28,7 +28,6 @@ class Updater extends \common_ext_ExtensionUpdater
 {
     public function update($initialVersion)
     {
-         $this->skip('0.0.0','3.0.0');
-         return null;
+         $this->skip('0.0.0','4.0.0');
     }
 }
diff --git a/views/css/platform-customizer.css.map b/views/css/platform-customizer.css.map
index a24ade7..5abbe83 100755
--- a/views/css/platform-customizer.css.map
+++ b/views/css/platform-customizer.css.map
@@ -11,5 +11,5 @@
 		"../../../tao/views/scss/inc/_farbtastic.scss"
 	],
 	"names": [],
-	"mappings": "AMqBA,AAAA,WAAW,AAAC,CACR,QAAQ,CAAE,QAAQ,CAClB,KAAK,CAAE,KAAqB,CAC5B,MAAM,CAAE,KAAqB,CAC7B,MAAM,CAAE,QAAQ,CA6BnB,AAjCD,AAKI,WALO,CAKP,MAAM,CALV,WAAW,CAKC,QAAQ,AAAC,CACb,GAAG,CAAE,eAAgC,CACrC,IAAI,CAAE,eAAgC,CACtC,KAAK,CAAE,eAAiC,CACxC,MAAM,CAAE,eAAiC,CAC5C,AAVL,AAWI,WAXO,CAWP,MAAM,AAAC,CACH,UAAU,CAAE,+xeAA+xe,CAAC,SAAS,CACrze,eAAe,CAAE,IAAI,CACrB,KAAK,CAAE,IAAI,CACX,MAAM,CAAE,IAAI,CACf,AAhBL,AAiBI,WAjBO,CAiBP,QAAQ,AAAC,CACL,UAAU,CAAE,uoFAAuoF,CAAC,SAAS,CAC7pF,eAAe,CAAE,IAAI,CACxB,AApBL,AAqBI,WArBO,CAqBP,OAAO,AAAC,CACJ,KAAK,CAAE,eAAgC,CACvC,MAAM,CAAE,eAAgC,CACxC,MAAM,CAAE,eAAgC,CAAC,CAAC,CAAC,CAAC,CAAC,eAAgC,CAC7E,QAAQ,CAAE,MAAM,CAChB,UAAU,CAAE,2rBAA2rB,CAAC,SAAS,CACjtB,eAAe,CAAE,IAAI,CACxB,AA5BL,AA6BI,WA7BO,CA6BP,CAAC,AAAC,CACE,QAAQ,CAAE,QAAQ,CAClB,MAAM,CAAE,SAAS,CACpB,ANnDL,AAAA,wBAAwB,AAAC,CACrB,KAAK,CAAE,KAAK,CACZ,QAAQ,CAAE,QAAQ,CAsGrB,AAxGD,AAGI,wBAHoB,CAGpB,iBAAiB,AAAC,CACd,SAAS,CAAE,IAAI,CACf,QAAQ,CAAE,QAAQ,CAClB,KAAK,CAAE,IAAI,CACX,WAAW,CAAE,IAAI,CACjB,OAAO,CAAE,MAAM,CACf,OAAO,CAAC,YAAY,CACpB,UAAU,CAAE,KAAK,CACjB,KAAK,CAAE,KAAK,CACf,AAZL,AAaI,wBAboB,CAapB,mBAAmB,AAAC,CAChB,MAAM,CAAE,OAAO,CAClB,AAfL,AAgBI,wBAhBoB,CAgBpB,MAAM,CAhBV,wBAAwB,CAgBZ,WAAW,CAhBvB,wBAAwB,CAgBC,MAAM,AAAC,CACxB,QAAQ,CAAE,QAAQ,CAClB,KAAK,CAAE,qBAAoB,CAC9B,AAnBL,AAoBI,wBApBoB,CAoBpB,MAAM,AAAC,CACH,UAAU,CAAE,IAAI,CAChB,UAAU,CAAE,cAAc,CAC1B,MAAM,CAAE,IAAI,CAIf,AA3BL,AAwBQ,wBAxBgB,CAoBpB,MAAM,CAIF,iBAAiB,AAAC,CACd,GAAG,CAAE,GAAG,CACX,AA1BT,AA4BI,wBA5BoB,CA4BpB,MAAM,AAAC,CACH,aAAa,CAAE,cAAc,CAIhC,AAjCL,AA8BQ,wBA9BgB,CA4BpB,MAAM,CAEF,iBAAiB,AAAC,CACd,GAAG,CAAE,IAAI,CACZ,AAhCT,AAmCQ,wBAnCgB,CAkCpB,WAAW,CACP,iBAAiB,AAAC,CACd,GAAG,CAAE,GAAG,CACR,KAAK,CAAE,GAAG,CACb,AAtCT,AAwCI,wBAxCoB,CAwCpB,KAAK,AAAC,CACF,MAAM,CAAE,iBAAiB,CACzB,OAAO,CAAE,KAAK,CACd,MAAM,CAAE,IAAI,CACZ,KAAK,CAAE,IAAI,CACd,AA7CL,AA8CI,wBA9CoB,CA8CpB,EAAE,CA9CN,wBAAwB,CA8ChB,EAAE,AAAC,CACH,SAAS,CAAE,IAAI,CACf,SAAS,CAAE,MAAM,CACpB,AAjDL,AAkDI,wBAlDoB,CAkDpB,SAAS,AAAC,CACN,MAAM,CAAE,OAAO,CAClB,AApDL,AAqDI,wBArDoB,CAqDpB,WAAW,AAAA,CACT,UAAU,CAAE,IAAI,CACjB,AAvDL,AAwDI,wBAxDoB,CAwDpB,iBAAiB,AAAC,CG8DlB,MAAM,CAAE,GAAG,CAAC,KAAK,CADQ,IAAI,CAE7B,aAAa,CAAE,GAAG,CAClB,qBAAqB,CAAE,GAAG,CH9DtB,UAAU,CIlBT,OAAqB,CJmBtB,OAAO,CAAC,IAAI,CACZ,QAAQ,CAAE,QAAQ,CAClB,GAAG,CAAE,KAAK,CACV,IAAI,CAAE,KAAK,CACX,KAAK,CAAE,KAAK,CAaf,AA5EL,AAgEQ,wBAhEgB,CAwDpB,iBAAiB,CAQb,aAAa,AAAA,CACT,KAAK,CAAE,IAAI,CACX,OAAO,CAAE,OAAO,CACnB,AAnET,AAoEQ,wBApEgB,CAwDpB,iBAAiB,CAYb,OAAO,AAAA,CACL,KAAK,CAAE,KAAK,CACZ,MAAM,CAAE,OAAO,CAChB,AAvET,AAwEM,wBAxEkB,CAwDpB,iBAAiB,CAgBf,WAAW,AAAA,CACT,OAAO,CAAE,OAAO,CAChB,aAAa,CAAE,CAAC,CACjB,AA3EP,AA8EI,wBA9EoB,CA8EpB,kBAAkB,CA9EtB,wBAAwB,CA8ED,iBAAiB,AAAC,CACjC,OAAO,CAAE,CAAC,CACV,GAAG,CAAE,IAAI,CAuBZ,AAvGL,AAiFQ,wBAjFgB,CA8EpB,kBAAkB,CAGd,aAAa,CAjFrB,wBAAwB,CA8ED,iBAAiB,CAGhC,aAAa,AAAC,CACV,KAAK,CAAE,KAAK,CACZ,MAAM,CAAE,IAAI,CAmBf,AAtGT,AAoFY,wBApFY,CA8EpB,kBAAkB,CAGd,aAAa,CAGT,UAAU,CApFtB,wBAAwB,CA8ED,iBAAiB,CAGhC,aAAa,CAGT,UAAU,AAAC,CACP,OAAO,CAAC,KAAK,CACb,KAAK,CAAE,IAAI,CACd,AAvFb,AAwFY,wBAxFY,CA8EpB,kBAAkB,CAGd,aAAa,CAOT,KAAK,CAxFjB,wBAAwB,CA8ED,iBAAiB,CAGhC,aAAa,CAOT,KAAK,AAAC,CACF,KAAK,CAAE,IAAI,CACX,SAAS,CAAE,IAAI,CAClB,AA3Fb,AA4FY,wBA5FY,CA8EpB,kBAAkB,CAGd,aAAa,CAWT,UAAU,CA5FtB,wBAAwB,CA8ED,iBAAiB,CAGhC,aAAa,CAWT,UAAU,AAAC,CACP,QAAQ,CAAE,MAAM,CAChB,MAAM,CAAE,IAAI,CAOf,AArGb,AA+FgB,wBA/FQ,CA8EpB,kBAAkB,CAGd,aAAa,CAWT,UAAU,CAGN,WAAW,CA/F3B,wBAAwB,CA8ED,iBAAiB,CAGhC,aAAa,CAWT,UAAU,CAGN,WAAW,AAAC,CACR,SAAS,CAAE,IAAI,CACf,SAAS,CAAE,MAAM,CACjB,OAAO,CAAE,IAAI,CACb,KAAK,CAAE,IAAI,CACd"
+	"mappings": "AMqBA,AAAA,WAAW,AAAC,CACR,QAAQ,CAAE,QAAQ,CAClB,KAAK,CAAE,KAAqB,CAC5B,MAAM,CAAE,KAAqB,CAC7B,MAAM,CAAE,QAAQ,CA6BnB,AAjCD,AAKI,WALO,CAKP,MAAM,CALV,WAAW,CAKC,QAAQ,AAAC,CACb,GAAG,CAAE,eAAgC,CACrC,IAAI,CAAE,eAAgC,CACtC,KAAK,CAAE,eAAiC,CACxC,MAAM,CAAE,eAAiC,CAC5C,AAVL,AAWI,WAXO,CAWP,MAAM,AAAC,CACH,UAAU,CAAE,+xeAA+xe,CAAC,SAAS,CACrze,eAAe,CAAE,IAAI,CACrB,KAAK,CAAE,IAAI,CACX,MAAM,CAAE,IAAI,CACf,AAhBL,AAiBI,WAjBO,CAiBP,QAAQ,AAAC,CACL,UAAU,CAAE,uoFAAuoF,CAAC,SAAS,CAC7pF,eAAe,CAAE,IAAI,CACxB,AApBL,AAqBI,WArBO,CAqBP,OAAO,AAAC,CACJ,KAAK,CAAE,eAAgC,CACvC,MAAM,CAAE,eAAgC,CACxC,MAAM,CAAE,eAAgC,CAAC,CAAC,CAAC,CAAC,CAAC,eAAgC,CAC7E,QAAQ,CAAE,MAAM,CAChB,UAAU,CAAE,2rBAA2rB,CAAC,SAAS,CACjtB,eAAe,CAAE,IAAI,CACxB,AA5BL,AA6BI,WA7BO,CA6BP,CAAC,AAAC,CACE,QAAQ,CAAE,QAAQ,CAClB,MAAM,CAAE,SAAS,CACpB,ANnDL,AAAA,wBAAwB,AAAC,CACrB,KAAK,CAAE,KAAK,CACZ,QAAQ,CAAE,QAAQ,CAsGrB,AAxGD,AAGI,wBAHoB,CAGpB,iBAAiB,AAAC,CACd,SAAS,CAAE,IAAI,CACf,QAAQ,CAAE,QAAQ,CAClB,KAAK,CAAE,IAAI,CACX,WAAW,CAAE,IAAI,CACjB,OAAO,CAAE,MAAM,CACf,OAAO,CAAC,YAAY,CACpB,UAAU,CAAE,KAAK,CACjB,KAAK,CAAE,KAAK,CACf,AAZL,AAaI,wBAboB,CAapB,mBAAmB,AAAC,CAChB,MAAM,CAAE,OAAO,CAClB,AAfL,AAgBI,wBAhBoB,CAgBpB,MAAM,CAhBV,wBAAwB,CAgBZ,WAAW,CAhBvB,wBAAwB,CAgBC,MAAM,AAAC,CACxB,QAAQ,CAAE,QAAQ,CAClB,KAAK,CAAE,qBAAoB,CAC9B,AAnBL,AAoBI,wBApBoB,CAoBpB,MAAM,AAAC,CACH,UAAU,CAAE,IAAI,CAChB,UAAU,CAAE,cAAc,CAC1B,MAAM,CAAE,IAAI,CAIf,AA3BL,AAwBQ,wBAxBgB,CAoBpB,MAAM,CAIF,iBAAiB,AAAC,CACd,GAAG,CAAE,GAAG,CACX,AA1BT,AA4BI,wBA5BoB,CA4BpB,MAAM,AAAC,CACH,aAAa,CAAE,cAAc,CAIhC,AAjCL,AA8BQ,wBA9BgB,CA4BpB,MAAM,CAEF,iBAAiB,AAAC,CACd,GAAG,CAAE,IAAI,CACZ,AAhCT,AAmCQ,wBAnCgB,CAkCpB,WAAW,CACP,iBAAiB,AAAC,CACd,GAAG,CAAE,GAAG,CACR,KAAK,CAAE,GAAG,CACb,AAtCT,AAwCI,wBAxCoB,CAwCpB,KAAK,AAAC,CACF,MAAM,CAAE,iBAAiB,CACzB,OAAO,CAAE,KAAK,CACd,MAAM,CAAE,IAAI,CACZ,KAAK,CAAE,IAAI,CACd,AA7CL,AA8CI,wBA9CoB,CA8CpB,EAAE,CA9CN,wBAAwB,CA8ChB,EAAE,AAAC,CACH,SAAS,CAAE,IAAI,CACf,SAAS,CAAE,MAAM,CACpB,AAjDL,AAkDI,wBAlDoB,CAkDpB,SAAS,AAAC,CACN,MAAM,CAAE,OAAO,CAClB,AApDL,AAqDI,wBArDoB,CAqDpB,WAAW,AAAA,CACT,UAAU,CAAE,IAAI,CACjB,AAvDL,AAwDI,wBAxDoB,CAwDpB,iBAAiB,AAAC,CG6DlB,MAAM,CAAE,GAAG,CAAC,KAAK,CADQ,IAAI,CAE7B,aAAa,CAAE,GAAG,CAClB,qBAAqB,CAAE,GAAG,CH7DtB,UAAU,CIlBT,OAAqB,CJmBtB,OAAO,CAAC,IAAI,CACZ,QAAQ,CAAE,QAAQ,CAClB,GAAG,CAAE,KAAK,CACV,IAAI,CAAE,KAAK,CACX,KAAK,CAAE,KAAK,CAaf,AA5EL,AAgEQ,wBAhEgB,CAwDpB,iBAAiB,CAQb,aAAa,AAAA,CACT,KAAK,CAAE,IAAI,CACX,OAAO,CAAE,OAAO,CACnB,AAnET,AAoEQ,wBApEgB,CAwDpB,iBAAiB,CAYb,OAAO,AAAA,CACL,KAAK,CAAE,KAAK,CACZ,MAAM,CAAE,OAAO,CAChB,AAvET,AAwEM,wBAxEkB,CAwDpB,iBAAiB,CAgBf,WAAW,AAAA,CACT,OAAO,CAAE,OAAO,CAChB,aAAa,CAAE,CAAC,CACjB,AA3EP,AA8EI,wBA9EoB,CA8EpB,kBAAkB,CA9EtB,wBAAwB,CA8ED,iBAAiB,AAAC,CACjC,OAAO,CAAE,CAAC,CACV,GAAG,CAAE,IAAI,CAuBZ,AAvGL,AAiFQ,wBAjFgB,CA8EpB,kBAAkB,CAGd,aAAa,CAjFrB,wBAAwB,CA8ED,iBAAiB,CAGhC,aAAa,AAAC,CACV,KAAK,CAAE,KAAK,CACZ,MAAM,CAAE,IAAI,CAmBf,AAtGT,AAoFY,wBApFY,CA8EpB,kBAAkB,CAGd,aAAa,CAGT,UAAU,CApFtB,wBAAwB,CA8ED,iBAAiB,CAGhC,aAAa,CAGT,UAAU,AAAC,CACP,OAAO,CAAC,KAAK,CACb,KAAK,CAAE,IAAI,CACd,AAvFb,AAwFY,wBAxFY,CA8EpB,kBAAkB,CAGd,aAAa,CAOT,KAAK,CAxFjB,wBAAwB,CA8ED,iBAAiB,CAGhC,aAAa,CAOT,KAAK,AAAC,CACF,KAAK,CAAE,IAAI,CACX,SAAS,CAAE,IAAI,CAClB,AA3Fb,AA4FY,wBA5FY,CA8EpB,kBAAkB,CAGd,aAAa,CAWT,UAAU,CA5FtB,wBAAwB,CA8ED,iBAAiB,CAGhC,aAAa,CAWT,UAAU,AAAC,CACP,QAAQ,CAAE,MAAM,CAChB,MAAM,CAAE,IAAI,CAOf,AArGb,AA+FgB,wBA/FQ,CA8EpB,kBAAkB,CAGd,aAAa,CAWT,UAAU,CAGN,WAAW,CA/F3B,wBAAwB,CA8ED,iBAAiB,CAGhC,aAAa,CAWT,UAAU,CAGN,WAAW,AAAC,CACR,SAAS,CAAE,IAAI,CACf,SAAS,CAAE,MAAM,CACjB,OAAO,CAAE,IAAI,CACb,KAAK,CAAE,IAAI,CACd"
 }
\ No newline at end of file