Java – How to change the response status code for successful operation in Swagger

As shown in the image, it says "Response Class (Status 200)" for the add operation. However, the add operation has been implemented in such a way that it will never return 200. It returns 201 on success.

My question is how can I change the (Status 200) to (Status 201)?
The code for this part is as follows:

@RequestMapping(method = RequestMethod.PUT, value = "/add")
@ApiOperation(value = "Creates a new person", code = 201)
@ApiResponses(value = {
        @ApiResponse(code = 201, message = "Record created successfully"),
        @ApiResponse(code = 409, message = "ID already taken")
})
public ResponseEntity<String> add(@RequestParam(value = "name", required = true) String name,
        @RequestParam(value = "id", required = true) String id) {
    if (PD.searchByID(id).size() == 0) {
        Person p = new Person(name, id);
        PD.addPerson(p);
        System.out.println("Person added.");
        return new ResponseEntity<String>(HttpStatus.CREATED);
    } else {
        System.out.println("ID already taken.");
        return new ResponseEntity<String>(HttpStatus.CONFLICT);
    }
}

Thanks!