diff --git a/plugin/src/main/java/com/denizenscript/denizen/nms/interfaces/ItemHelper.java b/plugin/src/main/java/com/denizenscript/denizen/nms/interfaces/ItemHelper.java
index 9289e6a5bf..c482c8e97b 100644
--- a/plugin/src/main/java/com/denizenscript/denizen/nms/interfaces/ItemHelper.java
+++ b/plugin/src/main/java/com/denizenscript/denizen/nms/interfaces/ItemHelper.java
@@ -2,6 +2,7 @@
 
 import com.denizenscript.denizen.nms.util.PlayerProfile;
 import com.denizenscript.denizen.nms.util.jnbt.CompoundTag;
+import com.denizenscript.denizen.nms.util.jnbt.IntArrayTag;
 import com.denizenscript.denizen.nms.util.jnbt.Tag;
 import org.bukkit.Color;
 import org.bukkit.Material;
@@ -14,6 +15,7 @@
 import org.bukkit.potion.PotionEffectType;
 
 import java.util.List;
+import java.util.UUID;
 
 public abstract class ItemHelper {
 
@@ -62,4 +64,12 @@ public void registerStonecuttingRecipe(String keyName, String group, ItemStack r
     public void setInventoryItem(Inventory inventory, ItemStack item, int slot) {
         inventory.setItem(slot, item);
     }
+
+    public IntArrayTag convertUuidToNbt(UUID id) {
+        throw new UnsupportedOperationException();
+    }
+
+    public UUID convertNbtToUuid(IntArrayTag id) {
+        throw new UnsupportedOperationException();
+    }
 }
diff --git a/plugin/src/main/java/com/denizenscript/denizen/utilities/nbt/CustomNBT.java b/plugin/src/main/java/com/denizenscript/denizen/utilities/nbt/CustomNBT.java
index 0730349cfe..28cbd7cff1 100644
--- a/plugin/src/main/java/com/denizenscript/denizen/utilities/nbt/CustomNBT.java
+++ b/plugin/src/main/java/com/denizenscript/denizen/utilities/nbt/CustomNBT.java
@@ -1,6 +1,7 @@
 package com.denizenscript.denizen.utilities.nbt;
 
 import com.denizenscript.denizen.nms.NMSHandler;
+import com.denizenscript.denizen.nms.NMSVersion;
 import com.denizenscript.denizen.nms.util.jnbt.*;
 import com.denizenscript.denizen.objects.properties.entity.EntityDisabledSlots.Action;
 import com.denizenscript.denizencore.utilities.CoreUtilities;
@@ -68,7 +69,7 @@ public static List<AttributeReturn> getAttributes(ItemStack itemStack) {
         for (int i = 0; i < attribs.size(); i++) {
             CompoundTag ct = attribs.get(i);
             AttributeReturn atr = new AttributeReturn();
-            atr.attr = (String) ct.getValue().get("AttributeName").getValue();
+            atr.attr = (String) ct.getValue().get(NMSHandler.getVersion().isAtLeast(NMSVersion.v1_16) ? "Name" : "AttributeName").getValue();
             atr.slot = ct.getValue().get("Slot") == null ? "mainhand" : (String) ct.getValue().get("Slot").getValue();
             atr.op = (Integer) ct.getValue().get("Operation").getValue();
             Tag t = ct.getValue().get("Amount");
@@ -85,19 +86,26 @@ else if (t instanceof DoubleTag) {
                 /// ????
                 atr.amt = 0;
             }
-            t = ct.getValue().get("UUIDMost");
-            if (t instanceof LongTag) {
-                atr.uuidMost = (Long) t.getValue();
+            if (NMSHandler.getVersion().isAtLeast(NMSVersion.v1_16) && ct.getValue().containsKey("UUID")) {
+                UUID id = NMSHandler.getItemHelper().convertNbtToUuid((IntArrayTag) ct.getValue().get("UUID"));
+                atr.uuidLeast = id.getLeastSignificantBits();
+                atr.uuidMost = id.getMostSignificantBits();
             }
-            else if (t instanceof IntTag) {
-                atr.uuidMost = (Integer) t.getValue();
-            }
-            t = ct.getValue().get("UUIDLeast");
-            if (t instanceof LongTag) {
-                atr.uuidLeast = (Long) t.getValue();
-            }
-            else if (t instanceof IntTag) {
-                atr.uuidLeast = (Integer) t.getValue();
+            else if (ct.getValue().containsKey("UUIDMost")) {
+                t = ct.getValue().get("UUIDMost");
+                if (t instanceof LongTag) {
+                    atr.uuidMost = (Long) t.getValue();
+                }
+                else if (t instanceof IntTag) {
+                    atr.uuidMost = (Integer) t.getValue();
+                }
+                t = ct.getValue().get("UUIDLeast");
+                if (t instanceof LongTag) {
+                    atr.uuidLeast = (Long) t.getValue();
+                }
+                else if (t instanceof IntTag) {
+                    atr.uuidLeast = (Integer) t.getValue();
+                }
             }
             attrs.add(atr);
         }
@@ -147,9 +155,15 @@ public static ItemStack addAttribute(ItemStack itemStack, String attr, String sl
         tmap.put("Amount", new DoubleTag(amt));
 
         long uuidhelp = uuidChoice(itemStack);
+        UUID fullUuid = new UUID(uuidhelp + 88512 + attribs.size(), uuidhelp * 2 + 1250025L + attribs.size());
 
-        tmap.put("UUIDMost", new LongTag(uuidhelp + 88512 + attribs.size()));
-        tmap.put("UUIDLeast", new LongTag(uuidhelp * 2 + 1250025L + attribs.size()));
+        if (NMSHandler.getVersion().isAtLeast(NMSVersion.v1_16)) {
+            tmap.put("UUID", NMSHandler.getItemHelper().convertUuidToNbt(fullUuid));
+        }
+        else {
+            tmap.put("UUIDMost", new LongTag(fullUuid.getMostSignificantBits()));
+            tmap.put("UUIDLeast", new LongTag(fullUuid.getLeastSignificantBits()));
+        }
 
         CompoundTag ct = NMSHandler.getInstance().createCompoundTag(tmap);
         attribs.add(ct);
diff --git a/v1_16/src/main/java/com/denizenscript/denizen/nms/v1_16/helpers/ItemHelperImpl.java b/v1_16/src/main/java/com/denizenscript/denizen/nms/v1_16/helpers/ItemHelperImpl.java
index 28a4ec9ae5..0fde96af09 100644
--- a/v1_16/src/main/java/com/denizenscript/denizen/nms/v1_16/helpers/ItemHelperImpl.java
+++ b/v1_16/src/main/java/com/denizenscript/denizen/nms/v1_16/helpers/ItemHelperImpl.java
@@ -256,4 +256,14 @@ public void setInventoryItem(Inventory inventory, ItemStack item, int slot) {
             inventory.setItem(slot, item);
         }
     }
+
+    @Override
+    public IntArrayTag convertUuidToNbt(UUID id) {
+        return new IntArrayTag(GameProfileSerializer.a(id).getInts());
+    }
+
+    @Override
+    public UUID convertNbtToUuid(IntArrayTag id) {
+        return GameProfileSerializer.a(new NBTTagIntArray(id.getValue()));
+    }
 }