diff --git a/backend/demo/pom.xml b/backend/demo/pom.xml
index 6eccaf5..2e50a85 100644
--- a/backend/demo/pom.xml
+++ b/backend/demo/pom.xml
@@ -12,6 +12,16 @@
     <version>3.4.4</version>
     <relativePath/>
 </parent>
+<repositories>
+    <repository>
+      <id>local-ttorrent</id>
+      <name>Local TTorrent Bundle</name>
+      <url>file://${project.basedir}/src/main/resources/lib</url>
+      <releases><enabled>true</enabled></releases>
+      <snapshots><enabled>false</enabled></snapshots>
+    </repository>
+  </repositories>
+
 
 <groupId>com.example</groupId>
 <artifactId>demo</artifactId>
@@ -28,7 +38,9 @@
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-web</artifactId>
     </dependency>
-    
+
+   
+
 
     <!-- 数据库驱动：MySQL、H2 -->
     <dependency>
@@ -97,39 +109,42 @@
   <version>0.11.5</version>
   <scope>runtime</scope>
 </dependency>
+<dependency>
+    <groupId>commons-codec</groupId>
+    <artifactId>commons-codec</artifactId>
+ </dependency>
+ <dependency>
+  <groupId>javax.annotation</groupId>
+  <artifactId>javax.annotation-api</artifactId>
+  <version>1.3.2</version>
+</dependency>
+
  <dependency>
     <groupId>com.turn</groupId>
     <artifactId>ttorrent-bencoding</artifactId>
-    <version>1.3.0-SNAPSHOT</version>
-  </dependency>
-
-  <!-- 通用工具模块（info_hash、文件结构等） -->
-  <dependency>
-    <groupId>com.turn</groupId>
-    <artifactId>ttorrent-common</artifactId>
-    <version>1.3.0-SNAPSHOT</version>
-  </dependency>
-
-  <!-- 网络通信支持（用于 Scrape/Tracker 通信） -->
-  <dependency>
-    <groupId>com.turn</groupId>
-    <artifactId>ttorrent-network</artifactId>
-    <version>1.0</version>
-  </dependency>
-
-  <!-- Tracker 服务（你自己部署的 announce 接口服务） -->
-  <dependency>
-    <groupId>com.turn</groupId>
-    <artifactId>ttorrent-tracker</artifactId>
-    <version>1.3.0-SNAPSHOT</version>
-  </dependency>
-
-  <!-- 客户端支持（如果你需要服务器自动发种、做种） -->
-  <dependency>
+    <version>1.3.0-SNAPSHOT</version> <!-- Changed to match your file -->
+</dependency>
+<dependency>
     <groupId>com.turn</groupId>
     <artifactId>ttorrent-client</artifactId>
-    <version>1.3.0-SNAPSHOT</version>
-  </dependency>
+    <version>1.3.0-SNAPSHOT</version> <!-- Changed to match your file -->
+</dependency>
+<dependency>
+    <groupId>com.turn</groupId>
+    <artifactId>ttorrent-common</artifactId>
+    <version>1.3.0-SNAPSHOT</version> <!-- Changed to match your file -->
+</dependency>
+<dependency>
+    <groupId>com.turn</groupId>
+    <artifactId>ttorrent-network</artifactId>
+    <version>1.0</version> <!-- Changed to match your file (1.0) -->
+</dependency>
+<dependency>
+    <groupId>com.turn</groupId>
+    <artifactId>ttorrent-tracker</artifactId>
+    <version>1.3.0-SNAPSHOT</version> <!-- Changed to match your file -->
+</dependency>
+
 </dependencies>
 
 <build>