diff --git a/README.md b/README.md
index 28145b3..60f60d4 100644
--- a/README.md
+++ b/README.md
@@ -156,7 +156,7 @@ Contributions are always welcome!
 - [ ] [System Design 101](https://github.com/ByteByteGoHq/system-design-101)
 - [ ] [Grokking the System Design Interview](https://www.educative.io/courses/grokking-modern-system-design-interview-for-engineers-managers)
 - [ ] [The System Design Primer](https://github.com/donnemartin/system-design-primer)
-- [ ] [Crack the System Design Interview](https://www.puncsky.com/blog/2016/02/14/crack-the-system-design-interview)
+- [ ] [Crack the System Design Interview](https://tianpan.co/notes/2016-02-13-crack-the-system-design-interview)
 - [ ] [System design interview for IT companies](https://github.com/checkcheckzz/system-design-interview)
 - [ ] [Web Architecture 101](https://medium.com/storyblocks-engineering/web-architecture-101-a3224e126947)
 - [ ] [What's in a Production Web Application?](https://web.archive.org/web/20210106095747/http://stephenmann.io/post/whats-in-a-production-web-application)