Buying Tenant Owned Property - Seller wants to keep Security Dep.

[Vincent Plant]

I'm in the process of putting together a deal where I am buying 2 twin properties. Its one building but two separate homes side by side and I'm buying them both simultaneously. They are both tenant occupied, and I will be inheriting the tenants. Its a great deal but the seller just told me as we are putting together the contract that he wants in writing that he will not have to transfer the security deposits over to me at closing. 

So basically if either of the tenant's decide to leave (on good terms) I will be responsible to return their deposit out of my own pocket. 

Not a horrible concession to give up but I don't really want to. I really don't want to lose the deal because its a cash flow cow, but I'm not happy about this arrangement. Should I drop it and just cave? Anyone have any creative suggestions to possibly reach a compromise?