Spring data mongodb field auto increment

Question

How can i make a field in collection incremented automatically ?

@Document
public class Product {

    @Id
    private BigInteger id;

    private String name;

    // need to be auto inc
    private int version;

i use CrudRepository

public interface ProductRepository extends CrudRepository<Product,BigInteger> {
}

i need to increment version in every creation of new product . example : {_id":"56d21eaeb61595413b3b3db7","name":"Prod 1", "version":"1"} {_id":"56d21eaeb61595413b3b3dbb","name":"Prod 2", "version":"2"}