diff --git a/php/src/GildedRose.php b/php/src/GildedRose.php
index d5f2f87e..c0318e15 100644
--- a/php/src/GildedRose.php
+++ b/php/src/GildedRose.php
@@ -33,45 +33,30 @@ final class GildedRose
                     $item->quality = $item->quality + 1;
                     if ($item->name === 'Backstage passes to a TAFKAL80ETC concert') {
                         if ($item->sellIn < 11) {
-                            $this->increaseQuality($item);
+                            $item->increaseQuality();
                         }
                         if ($item->sellIn < 6) {
-                            $this->increaseQuality($item);
+                            $item->increaseQuality();
                         }
                     }
                 }
             } else {
-                $this->decreaseQuality($item);
+                $item->decreaseQuality();
             }
 
             $item->sellIn = $item->sellIn - 1;
 
             if ($item->sellIn < 0) {
                 if ($item->name === 'Aged Brie') {
-                    $this->increaseQuality($item);
+                    $item->increaseQuality();
                 } else {
                     if ($item->name === 'Backstage passes to a TAFKAL80ETC concert') {
                         $item->quality = $item->quality - $item->quality;
                     } else {
-                        $this->decreaseQuality($item);
+                        $item->decreaseQuality();
                     }
                 }
             }
         }
     }
-
-    private function increaseQuality(Item &$item): void
-    {
-        if ($item->quality >= 50) {
-            return;
-        }
-        $item->quality += 1;
-    }
-
-    private function decreaseQuality(Item &$item): void
-    {
-        if ($item->quality > 0) {
-            $item->quality -= 1;
-        }
-    }
 }
diff --git a/php/src/Item.php b/php/src/Item.php
index f4c2d3a0..1121751c 100644
--- a/php/src/Item.php
+++ b/php/src/Item.php
@@ -23,4 +23,20 @@ final class Item
     {
         return "{$this->name}, {$this->sellIn}, {$this->quality}";
     }
+
+    public function increaseQuality(): void
+    {
+        if ($this->quality >= 50) {
+            return;
+        }
+        $this->quality += 1;
+    }
+
+    public function decreaseQuality(): void
+    {
+        if ($this->quality <= 0) {
+            return;
+        }
+        $this->quality -= 1;
+    }
 }