diff --git a/src/main/java/dev/dfonline/codeclient/dev/overlay/ChestPeeker.java b/src/main/java/dev/dfonline/codeclient/dev/overlay/ChestPeeker.java
index 615f01c..b51828d 100644
--- a/src/main/java/dev/dfonline/codeclient/dev/overlay/ChestPeeker.java
+++ b/src/main/java/dev/dfonline/codeclient/dev/overlay/ChestPeeker.java
@@ -120,6 +120,8 @@ public boolean onReceivePacket(Packet<?> packet) {
             if (expectingItems && packet instanceof ScreenHandlerSlotUpdateS2CPacket slot) {
                 var handler = CodeClient.MC.player.playerScreenHandler;
 
+                if(slot.getSlot() > handler.slots.size()) return false;
+
                 var removedItem = handler.getSlot(slot.getSlot()).getStack();
                 net.sendPacket(new CreativeInventoryActionC2SPacket(slot.getSlot(), removedItem));
                 CodeClient.MC.player.playerScreenHandler.setStackInSlot(slot.getSlot(), 0, removedItem);