diff --git a/Kotlin/src/main/kotlin/com/gildedrose/GildedRose.kt b/Kotlin/src/main/kotlin/com/gildedrose/GildedRose.kt
index d98092c6..afe10b76 100644
--- a/Kotlin/src/main/kotlin/com/gildedrose/GildedRose.kt
+++ b/Kotlin/src/main/kotlin/com/gildedrose/GildedRose.kt
@@ -46,9 +46,7 @@ class GildedRose(var items: List<Item>) {
                         items[i].quality = items[i].quality - items[i].quality
                     }
                 } else {
-                    if (items[i].quality < 50) {
-                        items[i].quality = items[i].quality + 1
-                    }
+                    items[i].quality = upgradeQuality(items[i].quality)
                 }
             }
         }