diff --git a/README.md b/README.md
index c4333b6..57c124c 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,10 @@
-# ICS2021 Programming Assignment
+# ICS2022 Programming Assignment
 
 This project is the programming assignment of the class ICS(Introduction to Computer System)
 in Department of Computer Science and Technology, Nanjing University.
 
 For the guide of this programming assignment,
-refer to http://nju-ics.gitbooks.io/ics2021-programming-assignment/content/
+refer to https://nju-projectn.github.io/ics-pa-gitbook/ics2022/
 
 To initialize, run
 ```bash