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 };