diff --git a/docs/并行与分布式系统/CS149.md b/docs/并行与分布式系统/CS149.md
index fdbb0db6..f300e4ea 100644
--- a/docs/并行与分布式系统/CS149.md
+++ b/docs/并行与分布式系统/CS149.md
@@ -14,7 +14,7 @@
 
 ## 课程资源
 
-- 课程网站：[CMU15418](http://15418.courses.cs.cmu.edu/spring2016/), [CS149](https://gfxcourses.stanford.edu/cs149/fall21)
+- 课程网站：[CMU15418]([http://15418.courses.cs.cmu.edu/spring2016/](https://www.cs.cmu.edu/~15418/)), [CS149](https://gfxcourses.stanford.edu/cs149/fall21)
 - 课程视频：<http://15418.courses.cs.cmu.edu/spring2016/lectures>
 - 课程教材：无
 - 课程作业：<https://gfxcourses.stanford.edu/cs149/fall21>，5 个编程作业