diff --git a/README.md b/README.md
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@@ -9,8 +9,8 @@ Learn System Design concepts and prepare for interviews using free resources.
 ## 📌 System Design Key Concepts
 - [Scalability](https://blog.algomaster.io/p/scalability)
 - [Latency vs Throughput](https://aws.amazon.com/compare/the-difference-between-throughput-and-latency/)
-- [CAP Theorem](https://www.bmc.com/blogs/cap-theorem/)
-- [ACID Transactions](https://redis.com/glossary/acid-transactions/)
+- [CAP Theorem](https://blog.algomaster.io/p/15f1d791-86ce-40ed-8269-962dbddbefdb)
+- [ACID Transactions](https://blog.algomaster.io/p/ecae03ba-1930-42ef-8796-83e2fa818989)
 - [Consistent Hashing](https://highscalability.com/consistent-hashing-algorithm/)
 - [Rate Limiting](https://www.imperva.com/learn/application-security/rate-limiting/)
 - [API Design](https://abdulrwahab.medium.com/api-architecture-best-practices-for-designing-rest-apis-bf907025f5f)