The popular Israeli midfielder has an indifferent season before finding some good form in the Hammers' run-in.
Yossi told the official site, "I'm very pleased to have agreed this new deal.
"From the first moment I arrived at West Ham, the Club felt like home to me. We have the best supporters in
"The natural thing for me was to sign a new deal and I'm very happy because I want to stay at this Club. I'm sure we'll have a better season next season because we have players with a lot of quality.
"We will also have new players coming in to make us stronger and better. I'm very pleased because it is the best place for me.
"The Chairman is very ambitious and I want to thank him because the negotiations were very quick. He and the manager showed me they wanted me to stay immediately. Hopefully I will pay them back on the pitch and I will do everything in my power to match their ambition."