We have just pushed a wallet update (v1.1.2) this update is not mandatory and does not effect day to day functions.
The update is mainly for preperation for the launch of Zyop on the testnet. A full change log can be found below.

Masternodes also do not need to update, or can do so in their own time.

Change log;

• Extra Testnet/Mainnet seeds
• Added checkpoints
• Updated min chainwork and assume valid blocks
• Added base structure for Zyop

More information will be coming over the next few days on how/when and what we would like tested when Zyop is active on the testnet.