diff --git a/pandalib-paper/src/main/java/fr/pandacube/lib/paper/players/PaperOffPlayer.java b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/players/PaperOffPlayer.java
index 114c0e1..a674522 100644
--- a/pandalib-paper/src/main/java/fr/pandacube/lib/paper/players/PaperOffPlayer.java
+++ b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/players/PaperOffPlayer.java
@@ -3,6 +3,9 @@ package fr.pandacube.lib.paper.players;
 import com.google.common.io.Files;
 import fr.pandacube.lib.paper.reflect.util.PrimaryWorlds;
 import fr.pandacube.lib.paper.reflect.wrapper.craftbukkit.CraftServer;
+import fr.pandacube.lib.paper.reflect.wrapper.dataconverter.MCDataConverter;
+import fr.pandacube.lib.paper.reflect.wrapper.dataconverter.MCTypeRegistry;
+import fr.pandacube.lib.paper.reflect.wrapper.minecraft.SharedConstants;
 import fr.pandacube.lib.paper.reflect.wrapper.minecraft.nbt.CompoundTag;
 import fr.pandacube.lib.paper.reflect.wrapper.minecraft.nbt.NbtIo;
 import fr.pandacube.lib.paper.util.PlayerDataWrapper;
@@ -150,17 +153,23 @@ public interface PaperOffPlayer extends AbstractOffPlayer {
     /**
      * Gets the NBT data from the playerdata file.
      * It will not work if the player is online, because the data on the file are not synchronized with real-time values.
+     * @param convertTag true to convert the data to the current MC version, false to keep the saved version
      * @return the NBT data from the playerdata file.
      * @throws IllegalStateException if the player is online.
      */
-    default CompoundTag getPlayerData() {
+    default CompoundTag getPlayerData(boolean convertTag) {
         if (isOnline())
             throw new IllegalStateException("Cannot access data file of " + getName() + " because they’re online.");
-        return ReflectWrapper.wrapTyped(Bukkit.getServer(), CraftServer.class)
+        CompoundTag data = ReflectWrapper.wrapTyped(Bukkit.getServer(), CraftServer.class)
                 .getServer()
                 .getPlayerList()
                 .playerIo()
                 .getPlayerData(getUniqueId().toString());
+        if (convertTag) {
+            int i = data.contains("DataVersion", 3) ? data.getInt("DataVersion") : -1;
+            data = MCDataConverter.convertTag(MCTypeRegistry.PLAYER(), data, i, SharedConstants.getCurrentVersion().getWorldVersion());
+        }
+        return data;
     }
 
     /**
@@ -170,7 +179,7 @@ public interface PaperOffPlayer extends AbstractOffPlayer {
      * @throws IllegalStateException if the player is online.
      */
     default PlayerDataWrapper getPlayerDataWrapper() {
-        return new PlayerDataWrapper(getPlayerData());
+        return new PlayerDataWrapper(getPlayerData(true));
     }
 
     /**
diff --git a/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/PandalibPaperReflect.java b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/PandalibPaperReflect.java
index a711c0a..ee54dfa 100644
--- a/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/PandalibPaperReflect.java
+++ b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/PandalibPaperReflect.java
@@ -10,7 +10,11 @@ import fr.pandacube.lib.paper.reflect.wrapper.craftbukkit.CraftVector;
 import fr.pandacube.lib.paper.reflect.wrapper.craftbukkit.CraftWorld;
 import fr.pandacube.lib.paper.reflect.wrapper.craftbukkit.RenderData;
 import fr.pandacube.lib.paper.reflect.wrapper.craftbukkit.VanillaCommandWrapper;
+import fr.pandacube.lib.paper.reflect.wrapper.dataconverter.MCDataConverter;
+import fr.pandacube.lib.paper.reflect.wrapper.dataconverter.MCDataType;
+import fr.pandacube.lib.paper.reflect.wrapper.dataconverter.MCTypeRegistry;
 import fr.pandacube.lib.paper.reflect.wrapper.minecraft.DetectedVersion;
+import fr.pandacube.lib.paper.reflect.wrapper.minecraft.GameVersion;
 import fr.pandacube.lib.paper.reflect.wrapper.minecraft.SharedConstants;
 import fr.pandacube.lib.paper.reflect.wrapper.minecraft.WorldVersion;
 import fr.pandacube.lib.paper.reflect.wrapper.minecraft.commands.BlockPosArgument;
@@ -107,6 +111,11 @@ public class PandalibPaperReflect {
         initWrapper(RenderData.class, RenderData.REFLECT.get());
         initWrapper(VanillaCommandWrapper.class, VanillaCommandWrapper.REFLECT.get());
 
+        // dataconverter
+        initWrapper(MCDataConverter.class, MCDataConverter.REFLECT.get());
+        initWrapper(MCDataType.class, MCDataType.REFLECT.get());
+        initWrapper(MCTypeRegistry.class, MCTypeRegistry.REFLECT.get());
+
         // minecraft.commands
         initWrapper(BlockPosArgument.class, BlockPosArgument.MAPPING.runtimeClass());
         initWrapper(Commands.class, Commands.MAPPING.runtimeClass());
@@ -170,6 +179,7 @@ public class PandalibPaperReflect {
         initWrapper(VoxelShape.class, VoxelShape.MAPPING.runtimeClass());
         // minecraft
         initWrapper(DetectedVersion.class, DetectedVersion.MAPPING.runtimeClass());
+        initWrapper(GameVersion.class, GameVersion.REFLECT.get());
         initWrapper(SharedConstants.class, SharedConstants.MAPPING.runtimeClass());
         initWrapper(WorldVersion.class, WorldVersion.MAPPING.runtimeClass());
 
diff --git a/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/dataconverter/MCDataConverter.java b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/dataconverter/MCDataConverter.java
new file mode 100644
index 0000000..aeb091e
--- /dev/null
+++ b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/dataconverter/MCDataConverter.java
@@ -0,0 +1,24 @@
+package fr.pandacube.lib.paper.reflect.wrapper.dataconverter;
+
+import fr.pandacube.lib.paper.reflect.wrapper.minecraft.nbt.CompoundTag;
+import fr.pandacube.lib.paper.reflect.wrapper.minecraft.network.chat.Component;
+import fr.pandacube.lib.reflect.Reflect;
+import fr.pandacube.lib.reflect.ReflectClass;
+import fr.pandacube.lib.reflect.ReflectMethod;
+import fr.pandacube.lib.reflect.wrapper.ReflectWrapper;
+
+import static fr.pandacube.lib.util.ThrowableUtil.wrapEx;
+import static fr.pandacube.lib.util.ThrowableUtil.wrapReflectEx;
+
+public class MCDataConverter extends ReflectWrapper {
+    public static final ReflectClass<?> REFLECT = wrapEx(() -> Reflect.ofClass("ca.spottedleaf.dataconverter.minecraft.MCDataConverter"));
+    private static final ReflectMethod<?> convertTag = wrapEx(() -> REFLECT.method("convertTag", Component.MAPPING.runtimeClass()));
+
+    public static CompoundTag convertTag(MCDataType type, CompoundTag data, int fromVersion, int toVersion) {
+        return wrap(wrapReflectEx(() -> convertTag.invokeStatic(unwrap(type), unwrap(data), fromVersion, toVersion)), CompoundTag.class);
+    }
+
+    protected MCDataConverter(Object obj) {
+        super(obj);
+    }
+}
diff --git a/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/dataconverter/MCDataType.java b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/dataconverter/MCDataType.java
new file mode 100644
index 0000000..3c96e05
--- /dev/null
+++ b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/dataconverter/MCDataType.java
@@ -0,0 +1,15 @@
+package fr.pandacube.lib.paper.reflect.wrapper.dataconverter;
+
+import fr.pandacube.lib.reflect.Reflect;
+import fr.pandacube.lib.reflect.ReflectClass;
+import fr.pandacube.lib.reflect.wrapper.ReflectWrapper;
+
+import static fr.pandacube.lib.util.ThrowableUtil.wrapEx;
+
+public class MCDataType extends ReflectWrapper {
+    public static final ReflectClass<?> REFLECT = wrapEx(() -> Reflect.ofClass("ca.spottedleaf.dataconverter.minecraft.datatypes.MCDataType"));
+
+    protected MCDataType(Object obj) {
+        super(obj);
+    }
+}
diff --git a/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/dataconverter/MCTypeRegistry.java b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/dataconverter/MCTypeRegistry.java
new file mode 100644
index 0000000..a48dcf9
--- /dev/null
+++ b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/dataconverter/MCTypeRegistry.java
@@ -0,0 +1,24 @@
+package fr.pandacube.lib.paper.reflect.wrapper.dataconverter;
+
+import fr.pandacube.lib.reflect.Reflect;
+import fr.pandacube.lib.reflect.ReflectClass;
+import fr.pandacube.lib.reflect.ReflectField;
+import fr.pandacube.lib.reflect.wrapper.ReflectWrapper;
+
+import static fr.pandacube.lib.util.ThrowableUtil.wrapEx;
+import static fr.pandacube.lib.util.ThrowableUtil.wrapReflectEx;
+
+public class MCTypeRegistry extends ReflectWrapper {
+    public static final ReflectClass<?> REFLECT = wrapEx(() -> Reflect.ofClass("ca.spottedleaf.dataconverter.minecraft.datatypes.MCTypeRegistry"));
+    private static final ReflectField<?> _PLAYER = wrapEx(() -> REFLECT.field("PLAYER"));
+
+    public static MCDataType PLAYER() {
+        return wrap(wrapReflectEx(_PLAYER::getStaticValue), MCDataType.class);
+    }
+
+
+
+    protected MCTypeRegistry(Object obj) {
+        super(obj);
+    }
+}
diff --git a/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/minecraft/GameVersion.java b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/minecraft/GameVersion.java
new file mode 100644
index 0000000..70b0b2b
--- /dev/null
+++ b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/minecraft/GameVersion.java
@@ -0,0 +1,28 @@
+package fr.pandacube.lib.paper.reflect.wrapper.minecraft;
+
+import fr.pandacube.lib.reflect.Reflect;
+import fr.pandacube.lib.reflect.ReflectClass;
+import fr.pandacube.lib.reflect.ReflectMethod;
+import fr.pandacube.lib.reflect.wrapper.ConcreteWrapper;
+import fr.pandacube.lib.reflect.wrapper.ReflectWrapper;
+import fr.pandacube.lib.reflect.wrapper.ReflectWrapperI;
+
+import static fr.pandacube.lib.util.ThrowableUtil.wrapEx;
+import static fr.pandacube.lib.util.ThrowableUtil.wrapReflectEx;
+
+@ConcreteWrapper(GameVersion.__concrete.class)
+public interface GameVersion extends ReflectWrapperI {
+    public static final ReflectClass<?> REFLECT = wrapEx(() -> Reflect.ofClass("com.mojang.bridge.game.GameVersion"));
+    public static final ReflectMethod<?> getWorldVersion = wrapEx(() -> REFLECT.method("getWorldVersion"));
+
+    default int getWorldVersion() {
+        return (int) wrapReflectEx(() -> getWorldVersion.invoke(__getRuntimeInstance()));
+    }
+
+
+    class __concrete extends ReflectWrapper implements GameVersion {
+        private __concrete(Object obj) {
+            super(obj);
+        }
+    }
+}
diff --git a/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/minecraft/WorldVersion.java b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/minecraft/WorldVersion.java
index d1aefcd..6f58c43 100644
--- a/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/minecraft/WorldVersion.java
+++ b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/minecraft/WorldVersion.java
@@ -9,7 +9,7 @@ import fr.pandacube.lib.reflect.wrapper.ReflectWrapperI;
 import static fr.pandacube.lib.util.ThrowableUtil.wrapEx;
 
 @ConcreteWrapper(WorldVersion.__concrete.class)
-public interface WorldVersion extends ReflectWrapperI {
+public interface WorldVersion extends GameVersion {
     ClassMapping MAPPING = wrapEx(() -> NMSReflect.mojClass("net.minecraft.WorldVersion"));
 
 
diff --git a/pandalib-paper/src/main/java/fr/pandacube/lib/paper/util/PlayerDataWrapper.java b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/util/PlayerDataWrapper.java
index 6ac9d5a..5146ab7 100644
--- a/pandalib-paper/src/main/java/fr/pandacube/lib/paper/util/PlayerDataWrapper.java
+++ b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/util/PlayerDataWrapper.java
@@ -91,20 +91,6 @@ public class PlayerDataWrapper {
 
 
 
-
-
-    private int getHeldItemSlot() {
-        if (!data.contains("SelectedItemSlot"))
-            return 0;
-        return data.getInt("SelectedItemSlot");
-    }
-
-    private void setHeldItemSlot(int slot) {
-        data.putInt("SelectedItemSlot", slot);
-    }
-
-
-
     private Inventory getBukkitInventory(String nbtKey, InventoryType bukkitType, IntUnaryOperator nbtToBukkitSlotConverter) {
         Map<Integer, ItemStack> stacks = getRawInvontoryContent(nbtKey);
         Inventory inv = Bukkit.createInventory(null, bukkitType);
@@ -169,6 +155,56 @@ public class PlayerDataWrapper {
 
 
 
+
+    private int getHeldItemSlot() {
+        if (!data.contains("SelectedItemSlot"))
+            return 0;
+        return data.getInt("SelectedItemSlot");
+    }
+
+    private void setHeldItemSlot(int slot) {
+        data.putInt("SelectedItemSlot", slot);
+    }
+
+
+
+
+
+    public int getScore() {
+        if (!data.contains("Score"))
+            return 0;
+        return data.getInt("Score");
+
+    }
+
+    public void setScore(int score) {
+        data.putInt("Score", score);
+    }
+
+
+
+    public int getTotalExperience() {
+        if (!data.contains("XpTotal"))
+            return 0;
+        return data.getInt("XpTotal");
+    }
+
+    public void setTotalExperience(int xp) {
+        data.putInt("XpTotal", xp);
+        double levelAndExp = ExperienceUtil.getLevelFromExp(xp);
+        int level = (int) levelAndExp;
+        double expProgress = levelAndExp - level;
+        data.putInt("XPLevel", level);
+        data.putFloat("XpP", (float) expProgress);
+    }
+
+
+
+
+
+
+
+
     private static class DummyPlayerInventory extends InventoryWrapper implements PlayerInventory {
 
         private int heldItemSlot;