diff --git a/README.md b/README.md
index baad16f..128805b 100644
--- a/README.md
+++ b/README.md
@@ -88,6 +88,7 @@ Join my free [AlgoMaster Newsletter](https://bit.ly/amghsd) and get a **FREE Sys
 - [Design Unified Payments Interface (UPI)](https://www.youtube.com/watch?v=QpLy0_c_RXk)
 ### Medium
 - [Design Distributed Job Scheduler](https://blog.algomaster.io/p/design-a-distributed-job-scheduler)
+- [Design a Scalable Notification Service](https://blog.algomaster.io/p/design-a-scalable-notification-service)
 - [Design Instagram](https://www.youtube.com/watch?v=VJpfO6KdyWE)
 - [Design Tinder](https://www.youtube.com/watch?v=tndzLznxq40)
 - [Design WhatsApp](https://www.youtube.com/watch?v=vvhC64hQZMk)
@@ -109,7 +110,6 @@ Join my free [AlgoMaster Newsletter](https://bit.ly/amghsd) and get a **FREE Sys
 - [Design Online Code Editor](https://www.youtube.com/watch?v=07jkn4jUtso)
 - [Design Stock Exchange System](https://www.youtube.com/watch?v=dUMWMZmMsVE)
 - [Design an Analytics Platform (Metrics & Logging)](https://www.youtube.com/watch?v=kIcq1_pBQSY)
-- [Design Notification Service](https://www.youtube.com/watch?v=CUwt9_l0DOg)
 - [Design Payment System](https://www.youtube.com/watch?v=olfaBgJrUBI)
 - [Design a Digital Wallet](https://www.youtube.com/watch?v=4ijjIUeq6hE)
 ### Hard