nconf-redis issue with null JSON values

gistfile1.js

var
  nconf = require('nconf');

require('nconf-redis');

var options = {
  host:'localhost',
  port:80,
  method:'GET'
}

var options_bad = {
  host:'localhost',
  port:80,
  securePort:null,
  method:'GET'
}

nconf.use('redis');

//save a simple key/value
nconf.set('test', true, function(err) {
  if (err)
    throw err;
  nconf.get('test', function(err, value) { 
    if (err)
      throw err;
    
    if (value)
      console.log('Simple key/value set and get fine.');
    else
      console.log('Failed to set and get simple key/value');
  });
});

//save JSON value with no nulls
nconf.set('JSON', options, function(err) {
  if (err)
    throw err;
  nconf.get('JSON', function(err, value) { 
    if (err)
      throw err;
      
    if (value)
      console.log('JSON value set and get fine.');
    else
      console.log('Failed to set and get JSON value')
  });
});

//save "BAD" JSON value with no nulls
nconf.set('badJSON', options_bad, function(err) {
  if (err)
    throw err;
  nconf.get('badJSON', function(err, value) { 
    if (err)
      throw err;
      
    if (value)
      console.log('bad JSON value set and get fine.');
    else
      console.log('Failed to set and get bad JSON value')
  });
});