Marathon Digital's Bitcoin L2 project, Anduro, has announced a significant advancement in Bitcoin's quantum resistance capabilities. The updated BIP 360 has been merged into the official Bitcoin GitHub repository, introducing the Pay-to-Merkle-Root (P2MR) output type. This update addresses the quantum vulnerability of Taproot's key path spending while maintaining compatibility with Tapscript and script trees. The update lays the groundwork for post-quantum signatures and is introduced via a soft fork, ensuring no impact on existing Taproot outputs.