According to CoinDesk, the XRP Ledger Foundation proposed a post-quantum upgrade in its 2027 protocol roadmap. The plan would allow users to register post-quantum signing keys based on the ML-DSA-44 algorithm for existing accounts and disable their old keys, helping guard against future quantum computers breaking traditional public-key cryptography. The proposed plan would keep the current base transaction fee unchanged, but post-quantum signatures would add about 3.6 KB to each transaction, increasing storage costs to around 3.1 times those of a standard payment.