diff --git a/composer.json b/composer.json
index 882d746..40c87b1 100644
--- a/composer.json
+++ b/composer.json
@@ -9,7 +9,7 @@
     ],
     "license": "MIT",
     "require": {
-        "php": ">=7.1.0",
+        "laravel/nova": "^2.0",
         "spatie/laravel-activitylog": "^3.2"
     },
     "autoload": {
diff --git a/config/nova-activitylog.php b/config/nova-activitylog.php
index c15c7b5..fcbfc52 100644
--- a/config/nova-activitylog.php
+++ b/config/nova-activitylog.php
@@ -1,10 +1,17 @@
 <?php
 
-return [
+/*
+ * This file is part of the bolechen/nova-activitylog
+ *
+ * (c) Bole Chen <avenger@php.net>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
 
+return [
     /*
      * Set the resource used for `nova-activitylog` package. Default is `activitylogs`.
      */
     'resourceName' => 'activitylogs',
-
 ];
diff --git a/src/NovaActivitylog.php b/src/NovaActivitylog.php
index ffe8131..2fd1dc1 100644
--- a/src/NovaActivitylog.php
+++ b/src/NovaActivitylog.php
@@ -20,7 +20,6 @@ class NovaActivitylog extends Tool
      */
     public function boot()
     {
-        //
     }
 
     /**
diff --git a/src/Resources/Activitylog.php b/src/Resources/Activitylog.php
index 2b66e8f..540343b 100644
--- a/src/Resources/Activitylog.php
+++ b/src/Resources/Activitylog.php
@@ -11,14 +11,14 @@
 
 namespace Bolechen\NovaActivitylog\Resources;
 
-use App\Nova\Resource;
 use Illuminate\Http\Request;
 use Laravel\Nova\Fields\Code;
 use Laravel\Nova\Fields\DateTime;
 use Laravel\Nova\Fields\ID;
 use Laravel\Nova\Fields\Text;
+use Laravel\Nova\Resource as NovaResource;
 
-class Activitylog extends Resource
+class Activitylog extends NovaResource
 {
     public static $model;