diff --git a/app/build.gradle b/app/build.gradle
index ee580af..3c022f8 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -32,5 +32,5 @@ java {
 
 application {
     // Define the main class for the application.
-    mainClass = 'cn.naipu.App'
+    mainClass = 'cn.naipu.MiraiTris.App'
 }
diff --git a/app/src/main/java/cn/naipu/App.java b/app/src/main/java/cn/naipu/MiraiTris/App.java
similarity index 85%
rename from app/src/main/java/cn/naipu/App.java
rename to app/src/main/java/cn/naipu/MiraiTris/App.java
index d297590..c3dee20 100644
--- a/app/src/main/java/cn/naipu/App.java
+++ b/app/src/main/java/cn/naipu/MiraiTris/App.java
@@ -1,7 +1,7 @@
 /*
  * This source file was generated by the Gradle 'init' task
  */
-package app.src.main.java.cn.naipu;
+package app.src.main.java.cn.naipu.MiraiTris;
 
 public class App {
     public String getGreeting() {
diff --git a/app/src/test/java/cn/naipu/AppTest.java b/app/src/test/java/cn/naipu/MiraiTris/AppTest.java
similarity index 77%
rename from app/src/test/java/cn/naipu/AppTest.java
rename to app/src/test/java/cn/naipu/MiraiTris/AppTest.java
index ea33f20..fdd025f 100644
--- a/app/src/test/java/cn/naipu/AppTest.java
+++ b/app/src/test/java/cn/naipu/MiraiTris/AppTest.java
@@ -1,11 +1,11 @@
 /*
  * This source file was generated by the Gradle 'init' task
  */
-package app.src.test.java.cn.naipu;
+package app.src.test.java.cn.naipu.MiraiTris;
 
 import org.junit.Test;
 import static org.junit.Assert.*;
-import app.src.main.java.cn.naipu.App;
+import app.src.main.java.cn.naipu.MiraiTris.App;
 
 public class AppTest {
     @Test public void appHasAGreeting() {