diff --git a/readme.md b/readme.md
index 270eadb6..0a33c763 100644
--- a/readme.md
+++ b/readme.md
@@ -174,10 +174,7 @@ val gui = kSpigot.inventoryGUI(InventoryGUIType.FIVE_BY_NINE) {
 
         // a button with a custom callback
         button(Slots.RowThreeSlotFive, ItemStack(Material.REPEATER)) {
-            it.bukkitEvent.inventory.setItem(
-                    Slots.RowTwoSlotFive,
-                    ItemStack(Material.values().random(), (1..64).random())
-            )
+            it.gui[Slots.RowTwoSlotFive] = ItemStack(Material.values().random(), (1..64).random()
         }
 
         // a slot where player interaction is permitted