diff --git a/build.gradle b/build.gradle
index 65f2e93..8f97050 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ plugins {
 }
 
 group = 'me.skymc'
-version = '5.2'
+version = '5.21'
 
 sourceCompatibility = 1.8
 targetCompatibility = 1.8
@@ -19,8 +19,8 @@ tasks.withType(ScalaCompile) {
 }
 
 repositories {
-    maven { url "http://ptms.ink:8081/repository/codemc-nms/" }
-    maven { url "http://ptms.ink:8081/repository/maven-releases/" }
+    maven { url "http://repo.ptms.ink/repository/codemc-nms/" }
+    maven { url "http://repo.ptms.ink/repository/maven-releases/" }
     maven { url "http://repo.extendedclip.com/content/repositories/placeholderapi/" }
     mavenCentral()
 }
@@ -34,6 +34,7 @@ dependencies {
     compile 'ink.ptms.core:v11500:11500:all'
     compile 'ink.ptms.core:v11400:11400:all'
     compile 'ink.ptms.core:v11300:11300:all'
+    compile 'ink.ptms.core:v10900:10900:all'
     compile 'ink.ptms.core:v10800:10800:all'
     compile 'net.md_5.bungee:BungeeCord:1:all'
     compile 'org.apache.commons:commons-lang3:3.8'
diff --git a/src/main/scala/io/izzel/taboolib/module/hologram/THologramHandler.java b/src/main/scala/io/izzel/taboolib/module/hologram/THologramHandler.java
index 92e9e2b..20e5df3 100644
--- a/src/main/scala/io/izzel/taboolib/module/hologram/THologramHandler.java
+++ b/src/main/scala/io/izzel/taboolib/module/hologram/THologramHandler.java
@@ -110,16 +110,32 @@ class THologramHandler implements Listener {
         List item = THologramHandler.getPacketName().read("b", List.class);
         for (Object element : item) {
             SimpleReflection.checkAndSave(element.getClass());
-            Object a = SimpleReflection.getFieldValue(element.getClass(), element, "a");
-            Object c = SimpleReflection.getFieldValue(element.getClass(), element, "c");
-            try {
-                Object i = Ref.getUnsafe().allocateInstance(element.getClass());
-                SimpleReflection.setFieldValue(element.getClass(), i, "a", a);
-                SimpleReflection.setFieldValue(element.getClass(), i, "b", name);
-                SimpleReflection.setFieldValue(element.getClass(), i, "c", c);
-                copy.add(i);
-            } catch (InstantiationException e) {
-                e.printStackTrace();
+            if (Version.isAfter(Version.v1_9)) {
+                Object a = SimpleReflection.getFieldValue(element.getClass(), element, "a");
+                Object c = SimpleReflection.getFieldValue(element.getClass(), element, "c");
+                try {
+                    Object i = Ref.getUnsafe().allocateInstance(element.getClass());
+                    SimpleReflection.setFieldValue(element.getClass(), i, "a", a);
+                    SimpleReflection.setFieldValue(element.getClass(), i, "b", name);
+                    SimpleReflection.setFieldValue(element.getClass(), i, "c", c);
+                    copy.add(i);
+                } catch (InstantiationException e) {
+                    e.printStackTrace();
+                }
+            } else {
+                Object a = SimpleReflection.getFieldValue(element.getClass(), element, "a");
+                Object b = SimpleReflection.getFieldValue(element.getClass(), element, "b");
+                Object d = SimpleReflection.getFieldValue(element.getClass(), element, "d");
+                try {
+                    Object i = Ref.getUnsafe().allocateInstance(element.getClass());
+                    SimpleReflection.setFieldValue(element.getClass(), i, "a", a);
+                    SimpleReflection.setFieldValue(element.getClass(), i, "b", b);
+                    SimpleReflection.setFieldValue(element.getClass(), i, "c", name);
+                    SimpleReflection.setFieldValue(element.getClass(), i, "d", d);
+                    copy.add(i);
+                } catch (InstantiationException e) {
+                    e.printStackTrace();
+                }
             }
         }
         packet.write("b", copy);
diff --git a/src/main/scala/io/izzel/taboolib/module/nms/NMSImpl.java b/src/main/scala/io/izzel/taboolib/module/nms/NMSImpl.java
index 0b522df..b7879e2 100644
--- a/src/main/scala/io/izzel/taboolib/module/nms/NMSImpl.java
+++ b/src/main/scala/io/izzel/taboolib/module/nms/NMSImpl.java
@@ -472,7 +472,7 @@ public class NMSImpl extends NMS {
         } else {
             Object createEntity = ((CraftWorld) location.getWorld()).createEntity(location, entity);
             try {
-                e.accept((T) createEntity);
+                e.accept((T) ((net.minecraft.server.v1_13_R2.Entity) createEntity).getBukkitEntity());
             } catch (Throwable t) {
                 t.printStackTrace();
             }
diff --git a/src/main/scala/io/izzel/taboolib/util/serialize/TSerializer.java b/src/main/scala/io/izzel/taboolib/util/serialize/TSerializer.java
index 1397c1b..06ef8c4 100644
--- a/src/main/scala/io/izzel/taboolib/util/serialize/TSerializer.java
+++ b/src/main/scala/io/izzel/taboolib/util/serialize/TSerializer.java
@@ -89,6 +89,10 @@ public class TSerializer {
     }
 
     public static String write(TSerializable serializable) {
+        return writeJson(serializable).toString();
+    }
+
+    public static JsonObject writeJson(TSerializable serializable) {
         JsonObject jsonObject = new JsonObject();
         JsonObject serializeObject = new JsonObject();
         for (Field declaredField : serializable.getClass().getDeclaredFields()) {
@@ -147,7 +151,7 @@ public class TSerializer {
             }
         }
         jsonObject.add("serializeObject", serializeObject);
-        return jsonObject.toString();
+        return jsonObject;
     }
 
     public static void readMap(Map map, String serializedString, TSerializerElementGeneral elementKey, TSerializerElementGeneral elementValue) {