# \[CONSTITUTIONAL\] AIP: ArbOS Version 50 Dia

**URL:** <https://forum.arbitrum.foundation/t/constitutional-aip-arbos-version-50-dia/29835>\
**Category:** Finalized AIPs\
**Tags:** proposal\
**Created:** [August 19, 2025, 5:23pm UTC](https://forum.arbitrum.foundation/t/constitutional-aip-arbos-version-50-dia/29835 "2025-08-19T17:23:09Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**Author:** ![Curia](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.arbitrum.foundation/curia/32/7751_2.png) [@Curia](https://forum.arbitrum.foundation/u/Curia)\
**Post date:** [September 2, 2025, 8:53am UTC](https://forum.arbitrum.foundation/t/constitutional-aip-arbos-version-50-dia/29835/10 "2025-09-02T08:53:37Z")

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We are supporting ArbOS 50 Dia because it is a straightforward but critical upgrade that keeps Arbitrum aligned with Ethereum’s Fusaka fork. The package of bug fixes and cryptographic improvements strengthens protocol security, while the new instrumentation for multi-gas tracking prepares the network for more flexible fee models ahead. Overall, we see this upgrade as low-risk, necessary, and positioning Arbitrum for continued growth.

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