diff --git a/src/Event/Extension/BuildAssetUrl.php b/src/Event/Extension/BuildAssetUrl.php
new file mode 100644
index 0000000..0c446a1
--- /dev/null
+++ b/src/Event/Extension/BuildAssetUrl.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace Picea\Event\Extension;
+
+interface BuildAssetUrl
+{
+    public function execute(string $uri, array $parameters = [], bool $appendVersion = true) : mixed;
+}
\ No newline at end of file
diff --git a/src/Extension/UrlExtension.php b/src/Extension/UrlExtension.php
index d4c0a47..f9f9f97 100644
--- a/src/Extension/UrlExtension.php
+++ b/src/Extension/UrlExtension.php
@@ -2,12 +2,7 @@
 
 namespace Picea\Extension;
 
-use Notes\Route\Attribute\Object\Route;
-
 use Picea\EventTrait;
-
-use Picea\Compiler\Context;
-
 use Picea\Event\Extension\{ UrlBuildAssetEvent, UrlBuildUrlEvent, UrlBuildRouteEvent, UrlRegisterRouteEvent };
 
 class UrlExtension implements Extension, FunctionExtension {