diff --git a/mkdocs.yml b/mkdocs.yml
index 645f52b..78674ca 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -171,9 +171,9 @@ nav:
     - 15.7   循环引用导致内存泄漏: 15_smart_pointer/07_loop_ref_leak.md
   - 第 16 章   无畏并发:
     - 16.1   多线程同时运行代码: 16_concurrency/01_multi_thread.md
-    - 16.1   跨线程消息传递: 16_concurrency/02_cross_thread_message_passing.md
-    - 16.2   共享状态的并发: 16_concurrency/03_shared_state_concurrency.md
-    - 16.3   Sync和Send扩展并发: 16_concurrency/04_sync_and_send.md
+    - 16.2   跨线程消息传递: 16_concurrency/02_cross_thread_message_passing.md
+    - 16.3   共享状态的并发: 16_concurrency/03_shared_state_concurrency.md
+    - 16.4   Sync和Send扩展并发: 16_concurrency/04_sync_and_send.md
   - 第 17 章   Rust面向对象编程:
     - 17.1   面向对象语言特性: 17_oop/01_oop_language_features.md
     - 17.2   使用trait存储不同类型值: 17_oop/02_trait_objects.md