diff --git a/mkdocs.yml b/mkdocs.yml
index 876d037a..2a8e0c59 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -25,4 +25,8 @@ nav:
   - 体系结构: 
     - 'Coursera: Nand2Tetris': '体系结构/N2T.md'
     - 'CS61C: Great Ideas in Computer Architecture': '体系结构/CS61C.md'
-    - 'CMU CS15213: CSAPP': '体系结构/CSAPP.md'
\ No newline at end of file
+    - 'CMU CS15213: CSAPP': '体系结构/CSAPP.md'
+  - 操作系统:
+    - 'MIT 6.S081: Operating System Engineering': '操作系统/MIT6.S081.md'
+    - 'CS162: Operating System': '操作系统/CS162.md'
+  
\ No newline at end of file