diff --git a/composer.json b/composer.json
index 1627f1d..1ad20e8 100644
--- a/composer.json
+++ b/composer.json
@@ -22,5 +22,14 @@
         "psr-4": {
             "Picea\\Asset\\": "src/"
         }
+    },
+    "extra": {
+        "lean": {
+            "autoload": {
+                "definition": [
+                    "meta/definitions.php"
+                ]
+            }
+        }
     }
 }
diff --git a/meta/definitions.php b/meta/definitions.php
new file mode 100644
index 0000000..ad492c4
--- /dev/null
+++ b/meta/definitions.php
@@ -0,0 +1,19 @@
+<?php
+
+use Picea\{ Asset, Language\LanguageRegistration, Ui\Ui };
+
+use function DI\{get, autowire, create};
+
+return [
+    Asset\Asset::class => autowire(Asset\Asset::class),
+
+    Asset\Config::class => create(Asset\Config::class)->constructor(
+        destination: getenv("PUBLIC_PATH") . DIRECTORY_SEPARATOR . "static"
+    ),
+
+    Asset\FileFetcher::class => function($c) {
+        return new Asset\FileFetcher($c->get(Lean\Lean::class)->getAssetPaths());
+    },
+
+    LanguageRegistration::class => create(\Lean\PiceaDefaultRegistration::class)->constructor(get('picea.extensions'), [], [], get(Ui::class), get(Asset\Asset::class)),
+];
\ No newline at end of file