diff --git a/README.md b/README.md
index 87fc9f4..a7aface 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,7 @@ A blockchain implementation in Go, as described in these articles:
 
 1. [Basic Prototype](https://jeiwan.cc/posts/building-blockchain-in-go-part-1/)
 2. [Proof-of-Work](https://jeiwan.cc/posts/building-blockchain-in-go-part-2/)
-2. [Persistence and CLI](https://jeiwan.cc/posts/building-blockchain-in-go-part-3/)
-3. [Transactions 1](https://jeiwan.cc/posts/building-blockchain-in-go-part-4/)
-3. [Addresses](https://jeiwan.cc/posts/building-blockchain-in-go-part-5/)
+3. [Persistence and CLI](https://jeiwan.cc/posts/building-blockchain-in-go-part-3/)
+4. [Transactions 1](https://jeiwan.cc/posts/building-blockchain-in-go-part-4/)
+5. [Addresses](https://jeiwan.cc/posts/building-blockchain-in-go-part-5/)
+6. [Transactions 2](https://jeiwan.cc/posts/building-blockchain-in-go-part-6/)