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# HF-20230515
2023-12-19 14:04:25 +01:00
The May 2023 protocol upgrade is to be comprised of the following CHIPs:
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1. [CHIP 2021-01 Allow Transactions to be smaller in size ](https://gitlab.com/bitcoin.cash/chips/-/blob/master/CHIP-2021-01-Restrict%20Transaction%20Versions.md )
2. [CHIP 2021-01 Restrict Transaction Version ](https://gitlab.com/bitcoin.cash/chips/-/blob/master/CHIP-2021-01-Restrict%20Transaction%20Versions.md )
3. [CHIP-2022-02-CashTokens: Token Primitives for Bitcoin Cash ](https://github.com/bitjson/cashtokens )
4. [CHIP-2022-05 Pay-to-Script-Hash-32 (P2SH32) for Bitcoin Cash ](https://gitlab.com/0353F40E/p2sh32/-/tree/main )
