diff --git a/README.md b/README.md
index d87dd5b..63663f3 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,71 @@
-# Laravel 5 Model Factory Generator [WIP]
+# Laravel 5 Model Factory Generator
 
-This package offer a lazy way to create a new model factory files, since Laravel has no Artisan command to generate it.
+This package offers a lazy way to create a new model factory files, since Laravel has no Artisan command to generate it.
+
+## Installation
+First, install this package via the Composer package manager:
+```
+composer require rymanalu/factory-generator
+```
+
+Next, you should add the `FactoryGeneratorServiceProvider` to the `providers` array of your `config/app.php` configuration file:
+```php
+Rymanalu\FactoryGenerator\FactoryGeneratorServiceProvider::class,
+```
+Now, you should be able to generate a new model factory file by executing `php artisan make:factory` command.
+
+## Usage
+`php artisan make:factory` accept one argument: the model class name with the namespace. Make sure the model is already exists before execute this command.
+
+Example:
+
+```
+php artisan make:factory "App\Post"
+```
+The command will generate a file named `PostFactory.php` in `path/to/your-laravel-project/database/factories` directory:
+
+```php
+<?php
+
+use App\Post;
+use Faker\Generator as Faker;
+
+$factory->define(Post::class, function (Faker $faker) {
+    //
+});
+```
+This command also using the fillable array of the model and assign it to `$faker->word` as default (you can change it to the proper [Faker](https://github.com/fzaninotto/Faker) Formatters later) in the generated model factory.
+
+For example, if the `App\Post` has fillable array like this:
+```php
+<?php
+
+namespace App;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Post extends Model
+{
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array
+     */
+    protected $fillable = [
+        'text',
+    ];
+}
+```
+Then, the command will generate the `PostFactory.php` like this:
+```php
+<?php
+
+use App\Post;
+use Faker\Generator as Faker;
+
+$factory->define(Post::class, function (Faker $faker) {
+    return [
+        'text' => $faker->word,
+    ];
+});
+```