diff --git a/src/FilamentWebhookServerServiceProvider.php b/src/FilamentWebhookServerServiceProvider.php
index 74136d2..794e01b 100644
--- a/src/FilamentWebhookServerServiceProvider.php
+++ b/src/FilamentWebhookServerServiceProvider.php
@@ -44,14 +44,14 @@ public function boot(): void
 
     private static function registerGlobalObserver(): void
     {
-        /** @var Model[] $MODELS */
-        $MODELS = [
-            config('filament-webhook-server.models'),
-        ];
+        /** @var array|string[] $MODELS */
+        $MODELS = config('filament-webhook-server.models', []);
 
         foreach ($MODELS as $MODEL) {
             foreach ($MODEL as $model) {
-                $model::observe(ModelObserver::class);
+                if (class_exists($model)) {
+                    $model::observe(ModelObserver::class);
+                }
             }
         }
     }