diff --git a/docs/math_phys/physics2/index.md b/docs/math_phys/physics2/index.md
index 12280ae7..598901e2 100644
--- a/docs/math_phys/physics2/index.md
+++ b/docs/math_phys/physics2/index.md
@@ -64,7 +64,7 @@ abbrs:
 
 ## 相关资源
 
-- [Kailqq 的普物 Ⅱ 课程笔记](https://www.kailqq.cc/NOTE/Physics/)
+- [Kailqq 的普物 Ⅱ 课程笔记](https://note.kailqq.cc/NOTE/Physics/)
 - [方明虎老师历年期中试题](https://pan.zju.edu.cn/share/a523ec4d1c8b723f048f35857f)
 
 ## 学习建议