diff --git a/README.md b/README.md
index b0cd290..8562b20 100644
--- a/README.md
+++ b/README.md
@@ -160,6 +160,7 @@ Contributions are always welcome!
 - [ ] [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)
 - [ ] [Distributed systems](http://book.mixu.net/distsys/single-page.html)
+- [ ] [Failover](https://blog.alexewerlof.com/p/failover)
 
 ### System design examples