diff --git a/extend.php b/extend.php
index fdaa829..773fdcc 100644
--- a/extend.php
+++ b/extend.php
@@ -10,9 +10,10 @@
  */
 
 namespace Therealsujitk\GIFs;
-use Illuminate\Contracts\Events\Dispatcher;
 
+use Flarum\Api\Event\Serializing;
 use Flarum\Extend;
+use Illuminate\Contracts\Events\Dispatcher;
 
 return [
     (new Extend\Frontend('forum'))
@@ -21,6 +22,6 @@
         ->js(__DIR__.'/js/dist/admin.js'),
     new Extend\Locales(__DIR__ . '/resources/locale'),
     function (Dispatcher $dispatcher) {
-        $dispatcher->subscribe(Listeners\SaveSettings::class);
+        $dispatcher->listen(Serializing::class, Listeners\SaveSettings::class);
     },
 ];
diff --git a/src/Listeners/SaveSettings.php b/src/Listeners/SaveSettings.php
index 999d8ca..0db6df7 100644
--- a/src/Listeners/SaveSettings.php
+++ b/src/Listeners/SaveSettings.php
@@ -2,23 +2,23 @@
 
 namespace Therealsujitk\GIFs\Listeners;
 
-use Flarum\Api\Serializer\UserSerializer;
 use Flarum\Api\Event\Serializing;
+use Flarum\Api\Serializer\ForumSerializer;
 use Flarum\Settings\SettingsRepositoryInterface;
-use Illuminate\Contracts\Events\Dispatcher;
 
-class SaveSettings {
-	protected $settings;
+class SaveSettings
+{
+    protected $settings;
 
-	public function __construct(SettingsRepositoryInterface $settings) {
-		$this->settings = $settings;
-	}
+    public function __construct(SettingsRepositoryInterface $settings)
+    {
+        $this->settings = $settings;
+    }
 
-	public function subscribe(Dispatcher $events) {
-		$events->listen(Serializing::class, [$this, 'addAttributes']);
-	}
-
-	public function addAttributes(Serializing $event) {
-		$event->attributes['therealsujitk-gifs.giphy_api_key'] = $this->settings->get('therealsujitk-gifs.giphy_api_key');
-	}
+    public function handle(Serializing $event)
+    {
+        if ($event->isSerializer(ForumSerializer::class)) {
+            $event->attributes['therealsujitk-gifs.giphy_api_key'] = $this->settings->get('therealsujitk-gifs.giphy_api_key');
+        }
+    }
 }