diff --git a/extensions/package-manager/src/Api/Resource/ExternalExtensionResource.php b/extensions/package-manager/src/Api/Resource/ExternalExtensionResource.php
index b5abb570e6..a4f1063ee5 100644
--- a/extensions/package-manager/src/Api/Resource/ExternalExtensionResource.php
+++ b/extensions/package-manager/src/Api/Resource/ExternalExtensionResource.php
@@ -133,13 +133,13 @@ public function filters(): array
     public function query(Context $context): object
     {
         return (new RequestWrapper($this->cache, 'https://flarum.org/api/extensions', 'GET', null, [
-                'Accept' => 'application/json',
-            ]))->withQueryParams([
-                'filter' => [
-                    // @todo
-                    'compatible-with' => '1.8.6', // Application::VERSION,
-                ],
-            ]);
+            'Accept' => 'application/json',
+        ]))->withQueryParams([
+            'filter' => [
+                // @todo
+                'compatible-with' => '1.8.6', // Application::VERSION,
+            ],
+        ]);
     }
 
     public function paginate(object $query, OffsetPagination $pagination): void
@@ -156,7 +156,6 @@ public function paginate(object $query, OffsetPagination $pagination): void
     public function results(object $query, Context $context): iterable
     {
         /** @var RequestWrapper $query */
-
         $json = $query->cache(function (RequestWrapper $query) {
             try {
                 $response = (new Client())->send($query->getRequest());
diff --git a/extensions/package-manager/src/Api/Schema/SortColumn.php b/extensions/package-manager/src/Api/Schema/SortColumn.php
index 467f265c6d..8758700081 100644
--- a/extensions/package-manager/src/Api/Schema/SortColumn.php
+++ b/extensions/package-manager/src/Api/Schema/SortColumn.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
 namespace Flarum\ExtensionManager\Api\Schema;
 
 use Flarum\ExtensionManager\External\RequestWrapper;
diff --git a/extensions/package-manager/src/Command/RequireExtensionHandler.php b/extensions/package-manager/src/Command/RequireExtensionHandler.php
index 0626772524..180b3abdf5 100755
--- a/extensions/package-manager/src/Command/RequireExtensionHandler.php
+++ b/extensions/package-manager/src/Command/RequireExtensionHandler.php
@@ -16,7 +16,6 @@
 use Flarum\ExtensionManager\Exception\ExtensionAlreadyInstalledException;
 use Flarum\ExtensionManager\Extension\Event\Installed;
 use Flarum\ExtensionManager\RequirePackageValidator;
-use Flarum\ExtensionManager\Support\Util;
 use Illuminate\Contracts\Events\Dispatcher;
 use Symfony\Component\Console\Input\StringInput;
 
diff --git a/extensions/package-manager/src/Composer/ComposerJson.php b/extensions/package-manager/src/Composer/ComposerJson.php
index e4c589090a..ee0f9b9168 100644
--- a/extensions/package-manager/src/Composer/ComposerJson.php
+++ b/extensions/package-manager/src/Composer/ComposerJson.php
@@ -11,7 +11,6 @@
 
 use Flarum\Extension\Extension;
 use Flarum\Extension\ExtensionManager;
-use Flarum\ExtensionManager\Support\Util;
 use Flarum\Foundation\Paths;
 use Illuminate\Filesystem\Filesystem;
 use Illuminate\Support\Str;
diff --git a/extensions/package-manager/src/Exception/CannotFetchExternalExtension.php b/extensions/package-manager/src/Exception/CannotFetchExternalExtension.php
index c76c8beae7..7459cafff8 100644
--- a/extensions/package-manager/src/Exception/CannotFetchExternalExtension.php
+++ b/extensions/package-manager/src/Exception/CannotFetchExternalExtension.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
 namespace Flarum\ExtensionManager\Exception;
 
 use Exception;
diff --git a/extensions/package-manager/src/External/RequestWrapper.php b/extensions/package-manager/src/External/RequestWrapper.php
index 15ce834089..005dc2e5f5 100644
--- a/extensions/package-manager/src/External/RequestWrapper.php
+++ b/extensions/package-manager/src/External/RequestWrapper.php
@@ -1,10 +1,16 @@
 <?php
 
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
 namespace Flarum\ExtensionManager\External;
 
 use Closure;
 use Illuminate\Contracts\Cache\Repository;
-use Illuminate\Support\Collection;
 use Laminas\Diactoros\Request;
 
 /**
@@ -42,6 +48,7 @@ public function __call(string $name, array $arguments): static
     {
         $new = $this->request->$name(...$arguments);
         $this->request = $new;
+
         return $this;
     }
 
diff --git a/extensions/package-manager/tests/integration/TestCase.php b/extensions/package-manager/tests/integration/TestCase.php
index 2bd626a7b6..7175ff3f16 100644
--- a/extensions/package-manager/tests/integration/TestCase.php
+++ b/extensions/package-manager/tests/integration/TestCase.php
@@ -12,7 +12,6 @@
 use Flarum\Extension\Extension;
 use Flarum\ExtensionManager\Composer\ComposerAdapter;
 use Flarum\ExtensionManager\Composer\ComposerJson;
-use Flarum\ExtensionManager\Support\Util;
 use Flarum\Foundation\Paths;
 use Flarum\Testing\integration\RetrievesAuthorizedUsers;
 use Illuminate\Support\Arr;
diff --git a/framework/core/src/Api/Resource/AbstractDatabaseResource.php b/framework/core/src/Api/Resource/AbstractDatabaseResource.php
index 2967b0a257..1968d6d82e 100644
--- a/framework/core/src/Api/Resource/AbstractDatabaseResource.php
+++ b/framework/core/src/Api/Resource/AbstractDatabaseResource.php
@@ -330,7 +330,7 @@ public function newModel(Context $context): object
         return new ($this->model());
     }
 
-    public final function filters(): array
+    final public function filters(): array
     {
         throw new RuntimeException('Not supported in Flarum, please use a model searcher instead https://docs.flarum.org/extend/search.');
     }