All checkboxes getting checked even if one is checked

I'm making a basic todo app in angularjs. Here's the code that's used to create a new todo with a checkbox

<div class="container" ng-controller = 'controller' >

    <h3>Enter Todo </h3> <input type="text" ng-model = 'new'>
    <button ng-click = 'add();' ng-disabled="status();">Add</button>

    <div ng-repeat = "i in todo" >
        <input type="checkbox" ng-model = "todo.done" /> <label></label>
     </div>

</div>

The problem is that all the checkboxes get checked even when I check just one

Here's my controller module

todoApp.controller('controller',['$scope',function($scope){ 
 $scope.new = '';   
 $scope.todo = [];

 $scope.add = function(){
    $scope.todo.push({name : $scope.new, done: false});
    console.log($scope.todo);
    $scope.new = '';
 };

 $scope.status = function(){
    return !(/\S+/.test($scope.new));
 };