diff --git a/config/packages/asset_mapper.php b/config/packages/asset_mapper.php
index aa061ef..3a3cc5f 100644
--- a/config/packages/asset_mapper.php
+++ b/config/packages/asset_mapper.php
@@ -1,19 +1,21 @@
 <?php declare(strict_types=1);
 
 use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
-use Symfony\Config\FrameworkConfig;
 
-return static function (
-    ContainerConfigurator $containerConfigurator,
-    FrameworkConfig $frameworkConfig,
-): void {
-    $frameworkConfig->assetMapper()
-        ->path('assets/', true)
-        ->missingImportMode('strict')
-        ->importmapPolyfill(false)
-    ;
+return static function (ContainerConfigurator $containerConfigurator): void {
+    $containerConfigurator->extension('framework', [
+        'asset_mapper' => [
+            'paths' => [
+                'assets/',
+            ],
+            'missing_import_mode' => 'strict',
+        ],
+    ]);
     if ($containerConfigurator->env() === 'prod') {
-        $frameworkConfig->assetMapper()
-            ->missingImportMode('warn');
+        $containerConfigurator->extension('framework', [
+            'asset_mapper' => [
+                'missing_import_mode' => 'warn',
+            ],
+        ]);
     }
 };