diff --git a/solutions.md b/solutions.md
index c1cc501..a4e3285 100644
--- a/solutions.md
+++ b/solutions.md
@@ -30,3 +30,4 @@ Question | Solutions | Videos
 | Movie Ticket Booking | [Solution-1](https://github.com/anomaly2104/ticket-booking-low-level-system-design) | [Video-1](https://www.youtube.com/playlist?list=PL564gOx0bCLpAL7yMJqOuK3_hBuLkyRhn)|
 | Uber Eats/ Door dash/ Swiggy| [Solution-1](https://github.com/mayankbansal93/lld-food-delivery-zomato-swiggy) | [Video-1](https://www.youtube.com/watch?v=LePt0PUKIjE&list=PLHNJ91XSF3wzT6BaLVi4WbnuHcfZSXMek&index=5)
 | e-Commerce Review System| [Solution-1](https://github.com/gopalbala/reviews) | [Video-1](https://www.youtube.com/watch?v=bKiCkExbe-Y)
+| Whatsapp Messenger | [Solution-1](https://lldcoding.com/design-lld-whatsapp-messenger-machine-coding) | --