Ethereum Foundation Sets December 2029 Deadline for Post Quantum Security Upgrade

The Ethereum Foundation officially set December 2029 as the deadline to upgrade the Ethereum network's Layer 1 to quantum resistant systems, it announced on Sunday, September 20, 2026. The decision is part of the roadmap for the network's next major upgrade, known as "Hegota," and covers security changes across the execution, consensus and data availability layers. The foundation's protocol team said the 2029 target is "non negotiable" until January 2027, when external experts will reassess the pace of quantum computing progress. One key component planned for the second quarter of 2027 is a proposal called "Frame Transactions," which separates a transaction's validation, execution and fee payment steps.