diff --git a/src/AttachToRole.php b/src/AttachToRole.php
index 1cc6660..36c504f 100644
--- a/src/AttachToRole.php
+++ b/src/AttachToRole.php
@@ -24,7 +24,7 @@ class AttachToRole extends Action
      */
     public function handle(ActionFields $fields, Collection $models)
     {
-        $role = Role::getModel()->find($fields['role']);
+        $role = Role::getObject()->find($fields['role']);
         foreach ($models as $model) {
             $role->givePermissionTo($model);
         }
@@ -39,7 +39,7 @@ public function handle(ActionFields $fields, Collection $models)
     public function fields(NovaRequest $request)
     {
         return [
-            Select::make('Role')->options(Role::getModel()->get()->pluck('name', 'id')->toArray())->displayUsingLabels(),
+            Select::make('Role')->options(Role::getObject()->get()->pluck('name', 'id')->toArray())->displayUsingLabels(),
         ];
     }
 }
diff --git a/src/Permission.php b/src/Permission.php
index 79d0016..6eac94f 100644
--- a/src/Permission.php
+++ b/src/Permission.php
@@ -63,8 +63,10 @@ public function __construct($resource = null)
 
     /**
      * The model the resource corresponds to.
+     *
+     * @return string
      */
-    public static function getModel()
+    public static function getModel(): string
     {
         return app(PermissionRegistrar::class)->getPermissionClass();
     }
diff --git a/src/Role.php b/src/Role.php
index c6d3dfd..a44fcbc 100644
--- a/src/Role.php
+++ b/src/Role.php
@@ -63,12 +63,20 @@ public function __construct($resource = null)
 
     /**
      * The model the resource corresponds to.
+     *
+     * @return string
      */
-    public static function getModel()
+    public static function getModel(): string
     {
-        $object = app(PermissionRegistrar::class)->getRoleClass();
+        return app(PermissionRegistrar::class)->getRoleClass();
+    }
 
-        return \is_string($object) ? app($object) : $object;
+    /**
+     * An object instance of the model the resource corresponds to.
+     */
+    public static function getObject()
+    {
+        return app(static::getModel());
     }
 
     /**