Javascript keys to strings

gistfile1.js

var myDictionary = {};
var myKey = 1;

myDictionary[myKey] = 'someValue';

console.log(typeof myKey);

for (var i in myDictionary) {
    console.log(typeof i);
}

console.log(myDictionary[1]);
myDictionary["1"] = 'someNewValue';
console.log(myDictionary[1]);

//derp