diff --git a/doc/installation.md b/doc/installation.md
index 38b2d10..6e650a3 100644
--- a/doc/installation.md
+++ b/doc/installation.md
@@ -15,7 +15,6 @@ FRONTEND
 - [Templates](#templates)
 ---
 ADDITIONAL
-- [Additional configuration](#additional-configuration)
 - [Known Issues](#known-issues)
 ---
 
diff --git a/doc/installation/attribute-mapping.md b/doc/installation/attribute-mapping.md
index 02ccf1f..8038869 100644
--- a/doc/installation/attribute-mapping.md
+++ b/doc/installation/attribute-mapping.md
@@ -37,6 +37,6 @@ use Sylius\Component\Core\Model\Order as BaseOrder;
      use BonusPointsAwareTrait;
 
      #[ORM\Column(type: 'integer', nullable: true)]
-     protected ?int $bonusPoints = null;
+     protected $bonusPoints = null;
  }
 ```
diff --git a/doc/installation/xml-mapping.md b/doc/installation/xml-mapping.md
index d4ba81b..7d3d822 100644
--- a/doc/installation/xml-mapping.md
+++ b/doc/installation/xml-mapping.md
@@ -21,7 +21,7 @@ Extend entities with parameters and methods using attributes and traits:
 
 declare(strict_types=1);
 
-namespace App\Entity\Order;
+namespace App\Entity;
 
 use BitBag\SyliusBonusPointsPlugin\Entity\BonusPointsAwareInterface;
 use BitBag\SyliusBonusPointsPlugin\Entity\BonusPointsAwareTrait;