diff --git a/README.md b/README.md
index 04d21a9..bc36191 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,7 @@
 * [Front-end Framework / Library](#build-your-own-front-end-framework--library)
 * [Game](#build-your-own-game)
 * [Git](#build-your-own-git)
+* [Machine Learning Algorithm](#build-your-own-machine-learning-algorithm)
 * [Network Stack](#build-your-own-network-stack)
 * [Neural Network](#build-your-own-neural-network)
 * [Operating System](#build-your-own-operating-system)
@@ -203,6 +204,11 @@
 * [**Python**: _Just enough of a Git client to create a repo, commit, and push itself to GitHub_](https://benhoyt.com/writings/pygit/)
 * [**Ruby**: _Rebuilding Git in Ruby_](https://robots.thoughtbot.com/rebuilding-git-in-ruby)
 
+
+#### Build your own `Machine Learning Algorithm`
+
+* [**Python**: _Learn ML Algorithms by coding: Decision Trees_](https://lethalbrains.com/learn-ml-algorithms-by-coding-decision-trees-439ac503c9a4)
+
 #### Build your own `Network Stack`
 
 * [**C**: _Beej's Guide to Network Programming_](http://beej.us/guide/bgnet/html/multi/index.html)