Simulated Annealing with only integer parameters

I am using simulannealbnd to optimize an objetive function. It works completely okey, however it seeks in float numbers and my objetive function only needs integer values. Does anyone know about a way of implementing that without changing the whole neighbour seek process?

I've tried with the 'Data type' option, setting it to 'custom', however, in this case i should implement a new 'Annealing Function' as well, which is completely out of my scope and knowledge.

Thank you all.