diff --git a/src/main/java/com/io/yutian/elementoriginlib/nbt/INBT.java b/src/main/java/com/io/yutian/elementoriginlib/nbt/INBT.java
index 489d664..869cdd0 100644
--- a/src/main/java/com/io/yutian/elementoriginlib/nbt/INBT.java
+++ b/src/main/java/com/io/yutian/elementoriginlib/nbt/INBT.java
@@ -127,32 +127,32 @@ public interface INBT {
     }
 
     static INBT as(net.minecraft.nbt.NBTBase nbtBase) {
-        byte type = nbtBase.a();
+        byte type = nbtBase.b();
         switch (type) {
             case 1:
                 NBTTagByte nbtTagByte = (NBTTagByte) nbtBase;
-                return new NBTByte(nbtTagByte.h());
+                return new NBTByte(nbtTagByte.i());
             case 2:
                 NBTTagShort nbtTagShort = (NBTTagShort) nbtBase;
-                return new NBTShort(nbtTagShort.g());
+                return new NBTShort(nbtTagShort.h());
             case 3:
                 NBTTagInt nbtTagInt = (NBTTagInt) nbtBase;
-                return new NBTInt(nbtTagInt.f());
+                return new NBTInt(nbtTagInt.g());
             case 4:
                 NBTTagLong nbtTagLong = (NBTTagLong) nbtBase;
-                return new NBTLong(nbtTagLong.e());
+                return new NBTLong(nbtTagLong.f());
             case 5:
                 NBTTagFloat nbtTagFloat = (NBTTagFloat) nbtBase;
-                return new NBTFloat(nbtTagFloat.j());
+                return new NBTFloat(nbtTagFloat.k());
             case 6:
                 NBTTagDouble nbtTagDouble = (NBTTagDouble) nbtBase;
-                return new NBTDouble(nbtTagDouble.i());
+                return new NBTDouble(nbtTagDouble.j());
             case 7:
                 NBTTagByteArray tagByteArray = (NBTTagByteArray) nbtBase;
-                return new NBTByteArray(tagByteArray.d());
+                return new NBTByteArray(tagByteArray.e());
             case 8:
                 NBTTagString nbtTagString = (NBTTagString) nbtBase;
-                return new NBTString(nbtTagString.e_());
+                return new NBTString(nbtTagString.m_());
             case 9:
                 NBTTagList nbtTagList = (NBTTagList) nbtBase;
                 List<INBT> list = new ArrayList<>();
@@ -163,16 +163,16 @@ public interface INBT {
             case 10:
                 NBTTagCompound nbtTagCompound = (NBTTagCompound) nbtBase;
                 Map<String, INBT> map = new HashMap<>();
-                for (String key : nbtTagCompound.d()) {
+                for (String key : nbtTagCompound.e()) {
                     map.put(key, as(nbtTagCompound.c(key)));
                 }
                 return new NBTCompound(map);
             case 11:
                 NBTTagIntArray nbtTagIntArray = (NBTTagIntArray) nbtBase;
-                return new NBTIntArray(nbtTagIntArray.f());
+                return new NBTIntArray(nbtTagIntArray.g());
             case 12:
                 NBTTagLongArray nbtTagLongArray = (NBTTagLongArray) nbtBase;
-                return new NBTLongArray(nbtTagLongArray.f());
+                return new NBTLongArray(nbtTagLongArray.g());
         }
         return null;
     }
diff --git a/src/main/java/com/io/yutian/elementoriginlib/nbt/NBTItem.java b/src/main/java/com/io/yutian/elementoriginlib/nbt/NBTItem.java
index f1672da..bd76d73 100644
--- a/src/main/java/com/io/yutian/elementoriginlib/nbt/NBTItem.java
+++ b/src/main/java/com/io/yutian/elementoriginlib/nbt/NBTItem.java
@@ -1,7 +1,7 @@
 package com.io.yutian.elementoriginlib.nbt;
 
 import net.minecraft.nbt.NBTTagCompound;
-import org.bukkit.craftbukkit.v1_18_R2.inventory.CraftItemStack;
+import org.bukkit.craftbukkit.v1_20_R1.inventory.CraftItemStack;
 import org.bukkit.inventory.ItemStack;
 import org.jetbrains.annotations.NotNull;
 
@@ -22,7 +22,7 @@ public class NBTItem {
 
     @NotNull
     public NBTCompound getTag() {
-        NBTTagCompound tag = nmsItemStack.u();
+        NBTTagCompound tag = nmsItemStack.w();
         if (tag == null) {
             tag = new NBTTagCompound();
         }
diff --git a/src/main/java/com/io/yutian/elementoriginlib/serialize/SerializeHelper.java b/src/main/java/com/io/yutian/elementoriginlib/serialize/SerializeHelper.java
index 38236dc..c8577da 100644
--- a/src/main/java/com/io/yutian/elementoriginlib/serialize/SerializeHelper.java
+++ b/src/main/java/com/io/yutian/elementoriginlib/serialize/SerializeHelper.java
@@ -4,7 +4,7 @@ import com.io.yutian.elementoriginlib.exception.SerializeException;
 import com.io.yutian.elementoriginlib.serialize.serializers.ItemStackSerializer;
 import com.io.yutian.elementoriginlib.serialize.serializers.UUIDSerializer;
 import com.io.yutian.elementoriginlib.util.ReflectionUtil;
-import org.bukkit.craftbukkit.v1_18_R2.inventory.CraftItemStack;
+import org.bukkit.craftbukkit.v1_20_R1.inventory.CraftItemStack;
 import org.bukkit.inventory.ItemStack;
 import org.json.JSONArray;
 import org.json.JSONObject;