diff --git a/eco-core/core-plugin/src/main/java/com/willfp/ecobosses/bosses/listeners/DeathListeners.java b/eco-core/core-plugin/src/main/java/com/willfp/ecobosses/bosses/listeners/DeathListeners.java
index 61893d9..8ac5c3a 100644
--- a/eco-core/core-plugin/src/main/java/com/willfp/ecobosses/bosses/listeners/DeathListeners.java
+++ b/eco-core/core-plugin/src/main/java/com/willfp/ecobosses/bosses/listeners/DeathListeners.java
@@ -133,7 +133,7 @@ public class DeathListeners extends PluginDependent implements Listener {
         List<ItemStack> drops = new ArrayList<>();
         for (Map.Entry<ItemStack, Double> entry : boss.getDrops().entrySet()) {
             if (NumberUtils.randFloat(0, 100) < entry.getValue()) {
-                drops.add(entry.getKey());
+                drops.add(entry.getKey().clone());
             }
         }