diff --git a/meta/definitions/routes.php b/meta/definitions/routes.php
index 9bfde7f..bbd2d1f 100644
--- a/meta/definitions/routes.php
+++ b/meta/definitions/routes.php
@@ -72,7 +72,7 @@ return [
 
                     public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
                     {
-                        return new Zend\Diactoros\Response\HtmlResponse($this->picea->renderHtml("lean/error/404", [], $this), 404);
+                        return new Laminas\Diactoros\Response\HtmlResponse($this->picea->renderHtml("lean/error/404", [], $this), 404);
                     }
 
                 };
diff --git a/meta/definitions/security.php b/meta/definitions/security.php
new file mode 100644
index 0000000..1cc4c09
--- /dev/null
+++ b/meta/definitions/security.php
@@ -0,0 +1,22 @@
+<?php
+
+use function DI\autowire, DI\create, DI\get;
+
+use Storage\Session;
+
+use Taxus\{ Privilege, Taxus, PermissionGrantInterface, DefaultPermissionGrant };
+
+use Psr\Http\Message\ServerRequestInterface;
+
+return [
+    Taxus::class => function ($c) {
+        return ( new Taxus( $c->get(PermissionGrantInterface::class) ) )->add(
+            [ new Privilege("dev", "Is a developper of this application."), "is_dev" ],
+            [ new Privilege("admin", "Can manage mostly everything from this application."), "is_admin" ],
+            [ new Privilege("user", "Is an authenticated user."), "is_user" ],
+            [ new Privilege("anonymous", "Is an anonymous (unauthenticated) user."), "is_anonymous" ],
+        );
+    },
+
+    PermissionGrantInterface::class => create(DefaultPermissionGrant::class)->constructor(get(ServerRequestInterface::class), get(Session::class)),
+];
diff --git a/meta/definitions/software.php b/meta/definitions/software.php
index 0e05207..0b6a091 100644
--- a/meta/definitions/software.php
+++ b/meta/definitions/software.php
@@ -2,7 +2,7 @@
 
 use function DI\autowire, DI\create, DI\get;
 
-use Zend\Diactoros\Response\HtmlResponse;
+use Laminas\Diactoros\Response\HtmlResponse;
 
 use TheBugs\JavascriptMiddleware;
 
diff --git a/meta/definitions/template.php b/meta/definitions/template.php
index 285ad40..58667fd 100644
--- a/meta/definitions/template.php
+++ b/meta/definitions/template.php
@@ -2,7 +2,7 @@
 
 use function DI\autowire, DI\create, DI\get;
 
-use Zend\Diactoros\Response\HtmlResponse;
+use Laminas\Diactoros\Response\HtmlResponse;
 
 use Picea\{ Picea, Caching\Cache, Caching\Opcache, Compiler, Compiler\Context, Compiler\BaseContext, FileFetcher, Language\DefaultRegistrations, Method\Request };
 use Picea\Extension\{ LanguageHandler, LanguageExtension, TitleExtension, MoneyExtension, UrlExtension };
diff --git a/src/Composer.php b/src/Composer.php
index c5f2fef..30b851b 100644
--- a/src/Composer.php
+++ b/src/Composer.php
@@ -3,6 +3,7 @@
 namespace Lean;
 
 use Composer\EventDispatcher\Event;
+use Kash\CacheInvalidator;
 
 class Composer
 {
@@ -48,6 +49,8 @@ class Composer
                 rmdir($dest);
 
                 $event->getIO()->write("Installation completed.");
+
+                static::postUpdate($event);
             }
             else {
                 $event->getIO()->writeError(sprintf("The user you are running this script with doesn't seem to have a writable permission on directory %s", static::createPath()));
@@ -61,9 +64,10 @@ class Composer
 
         $path = static::createPath('var/cache/version.cache');
 
-        if ( file_exists($path) ) {
-            $event->getIO()->write("removing cache file version to force a  '$path'");
-            unlink($path);
+        if ( is_writeable(dirname($path)) ) {
+            $event->getIO()->write("regenerating cache file version to invalidate cache for path '$path'");
+
+            new CacheInvalidator($path, true);
         }
     }
 
diff --git a/src/Routing.php b/src/Routing.php
index 1d153d0..cd76d4f 100644
--- a/src/Routing.php
+++ b/src/Routing.php
@@ -80,17 +80,11 @@ class Routing {
                         $container, $route, $annotation
                     ) : ResponseInterface
                     {
-                        $class = $annotation->class;
+                        $class = $annotation->class;    
                         $method = $annotation->classMethod;
 
                         # $container->set($class, autowire($class)->method($method, $request));
 
-                        /*if ( null !== ( $languageAnnotation = $this->language->verify($class) ) ) {
-                            if ( $languageAnnotation->key ) {
-                                # TODO !!! $language
-                            }
-                        }*/
-
                         $object = $container->get($class);
 
                         # Checking if user needs to be logged