how to display Serilog EventLevel values as string over swagger

Question

I am using nuget Serilog.AspNetCore and have below API controller,

    private readonly LoggingLevelSwitch _levelSwitch;

    public LoggingController(LoggingLevelSwitch levelSwitch)
    {
        _levelSwitch = levelSwitch;
    }

    [HttpPut("logLevel")]
    public IActionResult ChangeLevel(LogEventLevel eventLevel)
    {
        _levelSwitch.MinimumLevel = eventLevel;
        return Ok();
    }

The swagger output giving eventLevel integer values, but I am expecting string equivalent values. What is missing here?