diff --git a/build.gradle b/build.gradle
index 6229959..923eee5 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,7 +3,8 @@ plugins {
 }
 
 group 'tk.smileyik'
-version '1.4'
+version '1.5'
+archivesBaseName = 'LuaInMinecraftBukkit'
 
 repositories {
     maven {
@@ -31,9 +32,20 @@ test {
     useJUnitPlatform()
 }
 
+// 删除plugins文件夹中以前构建的文件.
+task deleteOldBuilds(type: Delete) {
+    for (final def f in file("${projectDir}/server/plugins/").listFiles()) {
+        if (f.isFile() && f.getName().startsWith("${archivesBaseName}")) {
+            printf("Remove old build: %s\n", f.toString())
+            delete f
+        }
+    }
+}
+
+// 复制当前版本到plugins文件夹中
 task copyTask(type: Copy) {
     dependsOn(build)
-    from "${buildDir}/libs/LuaInMinecraftBukkit-1.4.jar"
-    println "${projectDir}/server/plugins/LuaInMinecraftBukkit-1.4.jar"
+    dependsOn(deleteOldBuilds)
+    from "${buildDir}/libs/${archivesBaseName}-${version}.jar"
     into "${projectDir}/server/plugins/"
 }
\ No newline at end of file
diff --git a/src/main/java/tk/smileyik/luainminecraftbukkit/PluginSetting.java b/src/main/java/tk/smileyik/luainminecraftbukkit/PluginSetting.java
index 4d4bd2e..995033d 100644
--- a/src/main/java/tk/smileyik/luainminecraftbukkit/PluginSetting.java
+++ b/src/main/java/tk/smileyik/luainminecraftbukkit/PluginSetting.java
@@ -1,6 +1,6 @@
 package tk.smileyik.luainminecraftbukkit;
 
-import tk.smileyik.luainminecraftbukkit.luaplugin.util.NativeLuaLoader;
+import tk.smileyik.luainminecraftbukkit.util.NativeLuaLoader;
 
 import java.io.IOException;
 
diff --git a/src/main/java/tk/smileyik/luainminecraftbukkit/luaplugin/command/CommandRegister.java b/src/main/java/tk/smileyik/luainminecraftbukkit/luaplugin/command/CommandRegister.java
index d8861ea..5d0ee98 100644
--- a/src/main/java/tk/smileyik/luainminecraftbukkit/luaplugin/command/CommandRegister.java
+++ b/src/main/java/tk/smileyik/luainminecraftbukkit/luaplugin/command/CommandRegister.java
@@ -28,7 +28,8 @@ public void registerCommand(String command, String id) {
    * @param label 指令.
    * @param args 指令.
    */
-  public void dispatch(CommandSender sender, Command command, String label, String[] args) {
+  public void dispatch(CommandSender sender,
+                       Command command, String label, String[] args) {
     if (args.length >= 1) {
       label = args[0];
       if (commandMapper.containsKey(label)) {
diff --git a/src/main/java/tk/smileyik/luainminecraftbukkit/luaplugin/event/LuaEvent.java b/src/main/java/tk/smileyik/luainminecraftbukkit/luaplugin/event/LuaEvent.java
index c99c3d5..e92138d 100644
--- a/src/main/java/tk/smileyik/luainminecraftbukkit/luaplugin/event/LuaEvent.java
+++ b/src/main/java/tk/smileyik/luainminecraftbukkit/luaplugin/event/LuaEvent.java
@@ -27,7 +27,8 @@ public LuaEvent(String id) {
   public void event(T e) {
     try {
       if (closure != null) {
-        LuaInMinecraftBukkit.getPluginManager().callClosure(vars[0], closure, e);
+        LuaInMinecraftBukkit.getPluginManager()
+                .callClosure(vars[0], closure, e);
       } else {
         LuaInMinecraftBukkit.getPluginManager().callClosure(vars, e);
       }
diff --git a/src/main/java/tk/smileyik/luainminecraftbukkit/luaplugin/exception/LuaFunctionNotFountException.java b/src/main/java/tk/smileyik/luainminecraftbukkit/luaplugin/exception/LuaFunctionNotFountException.java
index cadc4cd..16e09ea 100644
--- a/src/main/java/tk/smileyik/luainminecraftbukkit/luaplugin/exception/LuaFunctionNotFountException.java
+++ b/src/main/java/tk/smileyik/luainminecraftbukkit/luaplugin/exception/LuaFunctionNotFountException.java
@@ -8,7 +8,8 @@ public LuaFunctionNotFountException(String pluginId, String path) {
     ));
   }
 
-  public LuaFunctionNotFountException(String pluginId, String path, Exception e) {
+  public LuaFunctionNotFountException(String pluginId,
+                                      String path, Exception e) {
     super(String.format(
             "脚本插件%s中未发现方法%s",
             pluginId, path
diff --git a/src/main/java/tk/smileyik/luainminecraftbukkit/luaplugin/util/NativeLuaLoader.java b/src/main/java/tk/smileyik/luainminecraftbukkit/util/NativeLuaLoader.java
similarity index 89%
rename from src/main/java/tk/smileyik/luainminecraftbukkit/luaplugin/util/NativeLuaLoader.java
rename to src/main/java/tk/smileyik/luainminecraftbukkit/util/NativeLuaLoader.java
index d0f8d2f..4fbac22 100644
--- a/src/main/java/tk/smileyik/luainminecraftbukkit/luaplugin/util/NativeLuaLoader.java
+++ b/src/main/java/tk/smileyik/luainminecraftbukkit/util/NativeLuaLoader.java
@@ -1,4 +1,4 @@
-package tk.smileyik.luainminecraftbukkit.luaplugin.util;
+package tk.smileyik.luainminecraftbukkit.util;
 
 import java.io.BufferedInputStream;
 import java.io.BufferedOutputStream;
@@ -81,9 +81,13 @@ public static void initNativeLua(File baseDir) throws IOException {
   }
 
   private static void storeLib(String from, File to) throws IOException {
-    try (BufferedInputStream bis =
-                 new BufferedInputStream(Objects.requireNonNull(NativeLuaLoader.class.getResourceAsStream(from)));
-         BufferedOutputStream bos = new BufferedOutputStream(Files.newOutputStream(to.toPath()))) {
+    try (
+            BufferedInputStream bis =
+                 new BufferedInputStream(Objects.requireNonNull(
+                         NativeLuaLoader.class.getResourceAsStream(from)));
+            BufferedOutputStream bos =
+                    new BufferedOutputStream(
+                         Files.newOutputStream(to.toPath()))) {
       byte[] bytes = new byte[8192];
       int len;
       while ((len = bis.read(bytes)) != -1) {
diff --git a/src/main/resources/plugin.yml b/src/main/resources/plugin.yml
index bb867aa..5d5a4d7 100644
--- a/src/main/resources/plugin.yml
+++ b/src/main/resources/plugin.yml
@@ -1,6 +1,6 @@
 name: LuaInMinecraftBukkit
 main: tk.smileyik.luainminecraftbukkit.LuaInMinecraftBukkit
-version: 1.4
+version: 1.5
 api-version: 1.13
 author: SmileYik
 commands:
diff --git a/src/test/java/tk/smileyik/NativeTest1.java b/src/test/java/tk/smileyik/NativeTest1.java
index c55d109..9dd5c6d 100644
--- a/src/test/java/tk/smileyik/NativeTest1.java
+++ b/src/test/java/tk/smileyik/NativeTest1.java
@@ -3,7 +3,7 @@
 import org.keplerproject.luajava.LuaException;
 import org.keplerproject.luajava.LuaState;
 import org.keplerproject.luajava.LuaStateFactory;
-import tk.smileyik.luainminecraftbukkit.luaplugin.util.NativeLuaLoader;
+import tk.smileyik.luainminecraftbukkit.util.NativeLuaLoader;
 
 import java.io.File;
 import java.io.IOException;
diff --git a/src/test/java/tk/smileyik/config/Test.java b/src/test/java/tk/smileyik/config/Test.java
index bd39610..c92b0bf 100644
--- a/src/test/java/tk/smileyik/config/Test.java
+++ b/src/test/java/tk/smileyik/config/Test.java
@@ -2,7 +2,7 @@
 
 import org.keplerproject.luajava.LuaException;
 import tk.smileyik.luainminecraftbukkit.api.luaconfig.LuaConfig;
-import tk.smileyik.luainminecraftbukkit.luaplugin.util.NativeLuaLoader;
+import tk.smileyik.luainminecraftbukkit.util.NativeLuaLoader;
 
 import java.io.File;
 import java.io.IOException;