diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index a869148..b2ee44b 100755
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -497,6 +497,7 @@ final class BackendController extends Controller
 
         $view->addData('currentCustomerRegion', $currentCustomerRegion);
 
+        $annualCustomerRegion = [];
         for ($i = 1; $i < 11; ++$i) {
             $annualCustomerRegion[] = [
                 'year'    => 2020 - 10 + $i,
@@ -520,7 +521,9 @@ final class BackendController extends Controller
             ];
         }
 
-        \uasort($currentCustomersRep, function($a, $b) { return $b['customers'] <=> $a['customers']; });
+        \uasort($currentCustomersRep, function($a, $b) {
+            return $b['customers'] <=> $a['customers'];
+        });
 
         $view->addData('currentCustomersRep', $currentCustomersRep);
 
@@ -547,7 +550,9 @@ final class BackendController extends Controller
             ];
         }
 
-        \uasort($currentCustomersCountry, function($a, $b) { return $b['customers'] <=> $a['customers']; });
+        \uasort($currentCustomersCountry, function($a, $b) {
+            return $b['customers'] <=> $a['customers'];
+        });
 
         $view->addData('currentCustomersCountry', $currentCustomersCountry);
 
@@ -664,6 +669,7 @@ final class BackendController extends Controller
 
         $view->addData('currentCustomerRegion', $currentCustomerRegion);
 
+        $annualCustomerRegion = [];
         for ($i = 1; $i < 11; ++$i) {
             $annualCustomerRegion[] = [
                 'year'    => 2020 - 10 + $i,
@@ -687,7 +693,9 @@ final class BackendController extends Controller
             ];
         }
 
-        \uasort($currentCustomersRep, function($a, $b) { return $b['customers'] <=> $a['customers']; });
+        \uasort($currentCustomersRep, function($a, $b) {
+            return $b['customers'] <=> $a['customers'];
+        });
 
         $view->addData('currentCustomersRep', $currentCustomersRep);
 
@@ -714,7 +722,9 @@ final class BackendController extends Controller
             ];
         }
 
-        \uasort($currentCustomersCountry, function($a, $b) { return $b['customers'] <=> $a['customers']; });
+        \uasort($currentCustomersCountry, function($a, $b) {
+            return $b['customers'] <=> $a['customers'];
+        });
 
         $view->addData('currentCustomersCountry', $currentCustomersCountry);
 
diff --git a/Models/Item.php b/Models/Item.php
index f7d339c..950c84f 100755
--- a/Models/Item.php
+++ b/Models/Item.php
@@ -216,7 +216,7 @@ class Item
     /**
      * Get attributes
      *
-     * @return ItemAttribute[]
+     * @return int[]|ItemAttribute[]
      *
      * @since 1.0.0
      */
diff --git a/Models/ItemAttributeType.php b/Models/ItemAttributeType.php
index 26460e0..41437a7 100755
--- a/Models/ItemAttributeType.php
+++ b/Models/ItemAttributeType.php
@@ -68,9 +68,7 @@ class ItemAttributeType implements \JsonSerializable, ArrayableInterface
      *
      * @var ItemAttributeTypeL11n
      */
-    protected string |
-
-ItemAttributeTypeL11n $l11n;
+    protected string|ItemAttributeTypeL11n $l11n;
 
     /**
      * Possible default attribute values
diff --git a/Models/ItemAttributeTypeL11n.php b/Models/ItemAttributeTypeL11n.php
index 655a60b..f1ec5f7 100755
--- a/Models/ItemAttributeTypeL11n.php
+++ b/Models/ItemAttributeTypeL11n.php
@@ -41,9 +41,7 @@ class ItemAttributeTypeL11n implements \JsonSerializable, ArrayableInterface
      * @var int|ItemAttributeType
      * @since 1.0.0
      */
-    protected int |
-
-ItemAttributeType $type = 0;
+    protected int|ItemAttributeType $type = 0;
 
     /**
      * Language.
diff --git a/composer.json b/composer.json
index 0bf301c..4f1a1e5 100755
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
     "require-dev": {
         "phpunit/phpunit": ">=9.4",
         "friendsofphp/php-cs-fixer": ">=3.0",
-        "squizlabs/php_codesniffer": ">=3.5",
+        "squizlabs/php_codesniffer": ">=3.6",
         "phpmd/phpmd": ">=2.9",
         "phpstan/phpstan": ">=0.12.58",
         "phan/phan": ">=3.2.6"