diff --git a/mkdocs.yml b/mkdocs.yml
index e6723977..967fd3b4 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -21,7 +21,7 @@ nav:
     - 'MIT18.06: Linear Algebra': '数学基础/MITLA.md'
     - 'MIT 6.042J: Mathematics for Computer Science': '数学基础/6.042J.md'
     - 'MIT6.050J: Information theory and Entropy': '数学基础/information.md'
-    - 'The Information Theory, Patter Recognition, and Neural Networks':'数学基础/The Information Theory, Pattern Recognition, and Neural Networks.md'
+    - 'The Information Theory, Patter Recognition, and Neural Networks': '数学基础/The Information Theory, Pattern Recognition, and Neural Networks.md'
   - 数学进阶:
     - 'UCB CS70: discrete Math and probability theory': '数学进阶/CS70.md'
     - 'UCB CS126: probability theory': '数学进阶/CS126.md'
@@ -38,7 +38,7 @@ nav:
     - 'EE16A&B: Designing Information Devices and Systems I&II': '电子基础/EE16.md'
     - 'UCB EE120 : Signal and Systems': '电子基础/signal.md'
   - 数据结构与算法:
-    - 'CS106B/X':'数据结构与算法/CS106B_CS106X.md'
+    - 'CS106B/X': '数据结构与算法/CS106B_CS106X.md'
     - 'UCB CS61B: Data Structures and Algorithms': '数据结构与算法/CS61B.md'
     - 'Coursera: Algorithms I & II': '数据结构与算法/Algo.md'
     - 'UCB CS170: Efficient Algorithms and Intractable Problems': '数据结构与算法/CS170.md'