# zkSync contracts v5.2 upgrade announcement
This upgrade includes features for the upcoming wallet integrations and some minor refactoring.
# Changes
The exact changes in the code of the contracts can be found here (opens new window)
# Added
- Additional method for CREATE2
ChangePubKey
authorization with extra custom data (wallet-specific). - Events for the pending withdrawals (in case a withdrawal fails over low gas limit).
# Changed
- Code cleanup after the previous upgrade with regenesis.
- Various minor / stylistic fixes.