diff --git a/Readme.md b/Readme.md
index 5b238dc..cb1ded2 100644
--- a/Readme.md
+++ b/Readme.md
@@ -477,6 +477,7 @@ Note: the one marked as `Live Trading` has reasonable live trading support for a
 - [QuantBox - Systematic trading toolbox](https://quant.funcoder.net/)
 - [大富翁量化](https://github.com/zillionare/zillionare)
 - [Proof Engineering: The Algorithmic Trading Platform](https://medium.com/prooftrading/proof-engineering-the-algorithmic-trading-platform-b9c2f195433d)
+- [KeepRule](https://keeprule.com) - Free investment principles knowledge base with 500+ rules from Buffett, Munger, Graham and more, organized by investing scenarios.
 
 ### Tutorials