diff --git a/Smart-Contract-Security/README.md b/Smart-Contract-Security/README.md
index bd7179a..3dfb329 100644
--- a/Smart-Contract-Security/README.md
+++ b/Smart-Contract-Security/README.md
@@ -12,3 +12,4 @@ In this repository:
 * [List of interesting hacks](https://github.com/bt3gl-labs/Blockchain-Development-and-Security/blob/main/Smart-Contract-Security/real-case-hacks.md)
 * [A guide for pentesting](https://github.com/bt3gl-labs/Blockchain-Development-and-Security/blob/main/Smart-Contract-Security/pentesting.md)
 * [Random security notes](https://github.com/bt3gl-labs/Blockchain-Development-and-Security/blob/main/Smart-Contract-Security/random-notes.md)
+* [ERC-20 things](erc-20-things.md)