# Announcement of imminent hard fork for EIP150 gas cost changes

DevFeed: [Announcement of imminent hard fork for EIP150 gas cost changes](<https://devfeed.tech/articles/announcement-of-imminent-hard-fork-for-eip150-gas-cost-changes-16782.md>)

Original publisher: [Read original article](<https://blog.ethereum.org/en/2016/10/13/announcement-imminent-hard-fork-eip150-gas-cost-changes>)

Author: Martin Swende

Published: 2016-10-13T23:25:27Z

Content type: release

Language: en

Sources: [Ethereum Foundation Blog](<https://devfeed.tech/sources/ethereum-foundation-blog.md>)

Topics: [Ethereum](<https://devfeed.tech/topics/ethereum.md>), [Network](<https://devfeed.tech/topics/network.md>), [Vulnerabilities](<https://devfeed.tech/topics/vulnerabilities.md>), [client](<https://devfeed.tech/topics/client.md>), [Protocol (disambiguation)](<https://devfeed.tech/topics/protocol.md>), [Transactions](<https://devfeed.tech/topics/transactions.md>)

Tags: [attacks](<https://devfeed.tech/tags/attacks.md>), [bug-bounty](<https://devfeed.tech/tags/bug-bounty.md>), [ethereum](<https://devfeed.tech/tags/ethereum.md>), [network](<https://devfeed.tech/tags/network.md>), [protocol](<https://devfeed.tech/tags/protocol.md>), [protocol-announcements](<https://devfeed.tech/tags/protocol-announcements.md>), [resiliency](<https://devfeed.tech/tags/resiliency.md>), [transactions](<https://devfeed.tech/tags/transactions.md>), [vulnerabilities](<https://devfeed.tech/tags/vulnerabilities.md>)

## AI overview

Ethereum announced an imminent hard fork based on EIP 150 to reprice certain EVM operations after sustained attacks exposed client and protocol vulnerabilities. A later fork was planned to address state bloat, and the fork block was moved to 2463000 to allow more testing.

## Source excerpt

During the last couple of weeks, the Ethereum network has been the target of a sustained attack. The attacker(s) have been very crafty in locating vulnerabilities in the client implementations as well as the protocol specification. While the recent patches have led to an overall increased resiliency in the...