<prompt> Human: So I moved into my apartment on June 5th. I signed the agreement for 1280 rent a month plus a 1120 security deposit. This is all fine fine and not a issue. However my landlord told melast night he made a mistake in the security deposit and wants another 1000 for it added into the rent due on july 1st. Can he do that? I have the rental agreement that we both signed showing the security deposit as 1120 along with multiple texts when I first contacted him about the apartment and he stated the 1120 security deposit. So 20 something days after signing he just realized he wanted an extra 1000 for the security deposit. Can he just add in the extra 1009 after we signed the contract its for a 1 year lease and Im already a month into it.TLDR: landlord told me security deposit was 1120. Signed rental agreement which states its 1120. Now he wants another 1000 because he said he should have asked for 2120.Edit: I live in California  <response>: If you have it in writing especially a signed document I think the agreement is meant to protect both parties. So in my opinion, he is obligated to give you the rates you both signed for. But you would get better information for this if you asked the folks over a rlegaladvice. They might have better insight into areas such as contractsdocuments.Also I dont know where you live, but 2120 deposit on a 1120 rental sounds super high. 