diff --git a/app/Providers/AppServiceProvider.php b/app/Providers/AppServiceProvider.php
index b3132bc..f201014 100644
--- a/app/Providers/AppServiceProvider.php
+++ b/app/Providers/AppServiceProvider.php
@@ -2,6 +2,7 @@
 
 namespace App\Providers;
 
+use Illuminate\Database\Eloquent\Relations\Relation;
 use Illuminate\Support\ServiceProvider;
 
 class AppServiceProvider extends ServiceProvider
@@ -19,6 +20,18 @@ class AppServiceProvider extends ServiceProvider
      */
     public function boot()
     {
-        \Schema::defaultStringLength(191);
+        $this->definePolymorphicTypes();
+    }
+
+    /**
+     * 自定义多态类型
+     */
+    protected function definePolymorphicTypes(): void
+    {
+        Relation::enforceMorphMap(
+            collect([
+                \App\Models\AdminUser::class,
+            ])->mapWithKeys(fn ($model) => [(new $model)->getTable() => $model])->all()
+        );
     }
 }