The Ethereum Foundation last week announced an imminent hard fork for EIP150 gas cost changes in response to the recent DoS (denial of service) attacks. It has proposed that the hardfork will occur at block 2,463,000 on or around Tuesday, October 18th.

Cryptocurrency exchanges including Poloniex and Coinbase have updated their customers regarding the current status of the upcoming Ethereum hardfork.

Poloniex said in a post, “As a Poloniex customer, you do not need to do anything. The migration will occur automatically, and your full balance of Ethereum will be transferred to the new chain. Keep in mind that as we near the fork, we will be temporarily disabling deposits and withdrawals in preparation for the migration process. Trading will continue to operate as normal during this period. Once the network is stable and the migration is complete, we will enable deposits and withdrawals.”

Coinbase also notified its customers in a post that the hardfork will likely cause ETH network instability for a period of time and there will be a delay on ETH deposits and withdrawals from Coinbase for up to the next 7 days. The digital currency exchange ensured that all customer ETH funds will be safely secured on its platform during the period.

Coinbase will temporarily suspend deposits and withdrawals from all customer ETH wallets starting Monday, October 17, 2016 at 6 P.M. PDT and will soon resume support for deposits and withdrawals of ETH after the fork. However, it added:

“Please be advised that Coinbase will support only one fork of the ETH protocol which we determine, at our sole discretion, best reflects the consensus approach. We will not support any other fork of the ETH protocol. If you wish to transact on alternative forked chains, please withdraw your ETH from the Coinbase platform no later than Monday, October 17, 2016 at 12 P.M. PDT.”