diff --git a/flashbots/mev-boost/README.md b/flashbots/mev-boost/README.md
index 0f90e9b..6cd5f52 100644
--- a/flashbots/mev-boost/README.md
+++ b/flashbots/mev-boost/README.md
@@ -32,5 +32,6 @@
 * [mev-boost post-merge](https://ethresear.ch/t/mev-boost-merge-ready-flashbots-architecture/11177)
 * [mev-boost builder stats dune](https://dune.com/ChainsightAnalytics/mev-after-ethereum-merge)
 * [flashbots analysis of mev in eth2](https://github.com/flashbots/eth2-research/blob/main/notebooks/mev-in-eth2/eth2-mev-calc.ipynb)
+* [ethereum specs for block builder](https://github.com/ethereum/builder-specs)