diff --git a/backend/app.py b/backend/app.py
index af37676..0b4b103 100644
--- a/backend/app.py
+++ b/backend/app.py
@@ -604,8 +604,8 @@ if __name__ == '__main__':
     init_db()
     
     # 启动服务
-    print('🚀 AI Chat App Backend started on http://localhost:19020')
-    print('📊 Admin Panel: http://localhost:19020/admin')
+    print('🚀 AI Chat App Backend started on http://localhost:19021')
+    print('📊 Admin Panel: http://localhost:19021/admin')
     print('👤 Default admin: admin / admin123')
     
-    app.run(host='0.0.0.0', port=19020, debug=True)
\ No newline at end of file
+    app.run(host='0.0.0.0', port=19021, debug=True)
\ No newline at end of file