# zkSync contracts v8 upgrade announcement
We will start the notice period to upgrade zkSync contracts to a new version today.
The exact changes in the code of the contracts can be found here (opens new window).
cutUpgradeNoticePeriodBySignaturea function for approving instant upgrade by security council members.
Create2Factory.sol- the smart contract that used to deploys targets.
- New event
ApproveCutUpgradeNoticePeriod(address)emitted after security council member approve upgrade.
- Check that the deposited amount is non-zero.
- Upgrade can be initialized/finished in case of exodus mode.
cutUpgradeNoticePeriodtakes the hash of targets to which upgrades initialized.
WithdrawalPending- event parameters changed.
FullExitmay be executed on
executeBlocksor stored as pending depending on the input parameters when executing the block.
- Minor gas optimizations are used.