diff --git a/src/main/java/de/iani/treasurechest/listener/ChestInventoryListener.java b/src/main/java/de/iani/treasurechest/listener/ChestInventoryListener.java
index eaf6856..b7c3845 100644
--- a/src/main/java/de/iani/treasurechest/listener/ChestInventoryListener.java
+++ b/src/main/java/de/iani/treasurechest/listener/ChestInventoryListener.java
@@ -157,9 +157,14 @@
                             for (int i = 0; i < priceCount; i++) {
                                 temp[i] = payoutEvent.getItems().get(i).clone();
                             }
-                            if (addItemsToInventory(clonedPlayerInventory, temp) == null) {
+
+                            FilledInventory copyInventoryStatus = addItemsToInventory(clonedPlayerInventory, temp);
+                            if (copyInventoryStatus == null) {
                                 plugin.sendMessage(player, "Du hast nicht genügend Platz in deinem Inventar!", true);
                                 return;
+                            } else if (copyInventoryStatus == FilledInventory.ShulkerInShulkerError) {
+                                plugin.sendMessage(player, "Du hast nicht genügend Platz in deinem Inventar! Shulker-Kisten können nicht in Shulker-Kisten gelagert werden.", true);
+                                return;
                             }
                         }
                         plugin.getServer().getPluginManager().callEvent(payoutEvent);
@@ -274,6 +279,15 @@
             return FilledInventory.PlayerInventory;
         }
 
+        for (ItemStack itemStack : items) {
+            if (itemStack.getItemMeta() instanceof BlockStateMeta blockStateMeta) {
+                BlockState blockState = blockStateMeta.getBlockState();
+                if (blockState instanceof ShulkerBox) {
+                    return FilledInventory.ShulkerInShulkerError;
+                }
+            }
+        }
+
         for (ItemStack inventoryItemStack : inventory.getContents()) {
             if (inventoryItemStack != null) {
                 if (inventoryItemStack.getItemMeta() instanceof BlockStateMeta blockStateMeta) {
@@ -300,6 +314,6 @@
     }
 
     private enum FilledInventory {
-        PlayerInventory, ShulkerBox
+        PlayerInventory, ShulkerBox, ShulkerInShulkerError
     }
 }