I just re-did mine. I let them know at the beginning of December via the monthly newsletter, that an updated contract would be coming at the end of the month. Then I gave it to them on their last day here before holidays and asked that one copy be signed and returned in January if they agreed to it and wanted to stay here. I stuck a sticky note on them highlighting the major changes but asked that they read it thoroughly. So far, no problems! Had a few questions about some of the changes but everyone has agreed to them.