diff --git a/vendor/backbone/backbone.js b/vendor/backbone/backbone.js
index 18acf663d..2ca5cd53b 100644
--- a/vendor/backbone/backbone.js
+++ b/vendor/backbone/backbone.js
@@ -1,4 +1,4 @@
-//     Backbone.js 1.2.3
+//     Backbone.js 1.3.2
 
 //     (c) 2010-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 //     Backbone may be freely distributed under the MIT license.
@@ -44,7 +44,7 @@
   var slice = Array.prototype.slice;
 
   // Current version of the library. Keep in sync with `package.json`.
-  Backbone.VERSION = '1.2.3';
+  Backbone.VERSION = '1.3.2';
 
   // For Backbone's purposes, jQuery, Zepto, Ender, or My Library (kidding) owns
   // the `$` variable.
@@ -242,7 +242,6 @@
 
       listening.obj.off(name, callback, this);
     }
-    if (_.isEmpty(listeningTo)) this._listeningTo = void 0;
 
     return this;
   };
@@ -299,7 +298,7 @@
         delete events[name];
       }
     }
-    if (_.size(events)) return events;
+    return events;
   };
 
   // Bind an event to only be triggered a single time. After the first time
@@ -309,7 +308,8 @@
   Events.once = function(name, callback, context) {
     // Map the event into a `{event: once}` object.
     var events = eventsApi(onceMap, {}, name, callback, _.bind(this.off, this));
-    return this.on(events, void 0, context);
+    if (typeof name === 'string' && context == null) callback = void 0;
+    return this.on(events, callback, context);
   };
 
   // Inversion-of-control versions of `once`.
@@ -398,7 +398,8 @@
     this.attributes = {};
     if (options.collection) this.collection = options.collection;
     if (options.parse) attrs = this.parse(attrs, options) || {};
-    attrs = _.defaults({}, attrs, _.result(this, 'defaults'));
+    var defaults = _.result(this, 'defaults');
+    attrs = _.defaults(_.extend({}, defaults, attrs), defaults);
     this.set(attrs, options);
     this.changed = {};
     this.initialize.apply(this, arguments);
@@ -714,7 +715,7 @@
 
     // Check if the model is currently in a valid state.
     isValid: function(options) {
-      return this._validate({}, _.defaults({validate: true}, options));
+      return this._validate({}, _.extend({}, options, {validate: true}));
     },
 
     // Run validation against the next complete set of model attributes,
@@ -824,7 +825,7 @@
     set: function(models, options) {
       if (models == null) return;
 
-      options = _.defaults({}, options, setOptions);
+      options = _.extend({}, setOptions, options);
       if (options.parse && !this._isModel(models)) {
         models = this.parse(models, options) || [];
       }
@@ -834,6 +835,7 @@
 
       var at = options.at;
       if (at != null) at = +at;
+      if (at > this.length) at = this.length;
       if (at < 0) at += this.length + 1;
 
       var set = [];
@@ -978,11 +980,13 @@
       return slice.apply(this.models, arguments);
     },
 
-    // Get a model from the set by id.
+    // Get a model from the set by id, cid, model object with id or cid
+    // properties, or an attributes object that is transformed through modelId.
     get: function(obj) {
       if (obj == null) return void 0;
-      var id = this.modelId(this._isModel(obj) ? obj.attributes : obj);
-      return this._byId[obj] || this._byId[id] || this._byId[obj.cid];
+      return this._byId[obj] ||
+        this._byId[this.modelId(obj.attributes || obj)] ||
+        obj.cid && this._byId[obj.cid];
     },
 
     // Returns `true` if the model is in the collection.
@@ -1913,5 +1917,4 @@
   };
 
   return Backbone;
-
 });
diff --git a/vendor/backbone/test/collection.js b/vendor/backbone/test/collection.js
index 40a08f15f..a0f6bf662 100644
--- a/vendor/backbone/test/collection.js
+++ b/vendor/backbone/test/collection.js
@@ -101,11 +101,6 @@
     assert.equal(collection2.get(model.clone()), collection2.first());
   });
 
-  QUnit.test('get with "undefined" id', function(assert) {
-    var collection = new Backbone.Collection([{id: 1}, {id: 'undefined'}]);
-    assert.equal(collection.get(1).id, 1);
-  });
-
   QUnit.test('has', function(assert) {
     assert.expect(15);
     assert.ok(col.has(a));
@@ -1583,7 +1578,7 @@
   });
 
   QUnit.test('_addReference binds all collection events & adds to the lookup hashes', function(assert) {
-    assert.expect(9);
+    assert.expect(8);
 
     var calls = {add: 0, remove: 0};
 
@@ -1603,7 +1598,6 @@
         assert.equal(this._byId[model.id], void 0);
         assert.equal(this._byId[model.cid], void 0);
         assert.equal(model.collection, void 0);
-        assert.equal(model._events, void 0);
       }
 
     });
@@ -1739,13 +1733,14 @@
     assert.equal(c2.modelId(m.attributes), void 0);
   });
 
-  QUnit.test('#3039: adding at index fires with correct at', function(assert) {
-    assert.expect(3);
-    var collection = new Backbone.Collection([{at: 0}, {at: 4}]);
+  QUnit.test('#3039 #3951: adding at index fires with correct at', function(assert) {
+    assert.expect(4);
+    var collection = new Backbone.Collection([{val: 0}, {val: 4}]);
     collection.on('add', function(model, coll, options) {
-      assert.equal(model.get('at'), options.index);
+      assert.equal(model.get('val'), options.index);
     });
-    collection.add([{at: 1}, {at: 2}, {at: 3}], {at: 1});
+    collection.add([{val: 1}, {val: 2}, {val: 3}], {at: 1});
+    collection.add({val: 5}, {at: 10});
   });
 
   QUnit.test('#3039: index is not sent when at is not specified', function(assert) {
diff --git a/vendor/backbone/test/events.js b/vendor/backbone/test/events.js
index b9b5053fe..544b39a19 100644
--- a/vendor/backbone/test/events.js
+++ b/vendor/backbone/test/events.js
@@ -417,6 +417,18 @@
     assert.equal(obj.counterB, 1, 'counterB should have only been incremented once.');
   });
 
+  QUnit.test('bind a callback with a default context when none supplied', function(assert) {
+    assert.expect(1);
+    var obj = _.extend({
+      assertTrue: function() {
+        assert.equal(this, obj, '`this` was bound to the callback');
+      }
+    }, Backbone.Events);
+
+    obj.once('event', obj.assertTrue);
+    obj.trigger('event');
+  });
+
   QUnit.test('bind a callback with a supplied context', function(assert) {
     assert.expect(1);
     var TestClass = function() {
@@ -587,6 +599,19 @@
     assert.equal(obj.counter, 3);
   });
 
+  QUnit.test('bind a callback with a supplied context using once with object notation', function(assert) {
+    assert.expect(1);
+    var obj = {counter: 0};
+    var context = {};
+    _.extend(obj, Backbone.Events);
+
+    obj.once({
+      a: function() {
+        assert.strictEqual(this, context, 'defaults `context` to `callback` param');
+      }
+    }, context).trigger('a');
+  });
+
   QUnit.test('once with off only by context', function(assert) {
     assert.expect(0);
     var context = {};
diff --git a/vendor/backbone/test/model.js b/vendor/backbone/test/model.js
index 5022a3957..b73a1c794 100644
--- a/vendor/backbone/test/model.js
+++ b/vendor/backbone/test/model.js
@@ -34,6 +34,12 @@
     assert.equal(model.collection, collection);
   });
 
+  QUnit.test('Object.prototype properties are overridden by attributes', function(assert) {
+    assert.expect(1);
+    var model = new Backbone.Model({hasOwnProperty: true});
+    assert.equal(model.get('hasOwnProperty'), true);
+  });
+
   QUnit.test('initialize with attributes and options', function(assert) {
     assert.expect(1);
     var Model = Backbone.Model.extend({
@@ -57,19 +63,6 @@
     assert.equal(model.get('value'), 2);
   });
 
-  QUnit.test('initialize with defaults', function(assert) {
-    assert.expect(2);
-    var Model = Backbone.Model.extend({
-      defaults: {
-        firstName: 'Unknown',
-        lastName: 'Unknown'
-      }
-    });
-    var model = new Model({'firstName': 'John'});
-    assert.equal(model.get('firstName'), 'John');
-    assert.equal(model.get('lastName'), 'Unknown');
-  });
-
   QUnit.test('parse can return null', function(assert) {
     assert.expect(1);
     var Model = Backbone.Model.extend({
@@ -428,7 +421,7 @@
   });
 
   QUnit.test('defaults', function(assert) {
-    assert.expect(4);
+    assert.expect(9);
     var Defaulted = Backbone.Model.extend({
       defaults: {
         one: 1,
@@ -438,6 +431,9 @@
     var model = new Defaulted({two: undefined});
     assert.equal(model.get('one'), 1);
     assert.equal(model.get('two'), 2);
+    model = new Defaulted({two: 3});
+    assert.equal(model.get('one'), 1);
+    assert.equal(model.get('two'), 3);
     Defaulted = Backbone.Model.extend({
       defaults: function() {
         return {
@@ -449,6 +445,15 @@
     model = new Defaulted({two: undefined});
     assert.equal(model.get('one'), 3);
     assert.equal(model.get('two'), 4);
+    Defaulted = Backbone.Model.extend({
+      defaults: {hasOwnProperty: true}
+    });
+    model = new Defaulted();
+    assert.equal(model.get('hasOwnProperty'), true);
+    model = new Defaulted({hasOwnProperty: undefined});
+    assert.equal(model.get('hasOwnProperty'), true);
+    model = new Defaulted({hasOwnProperty: false});
+    assert.equal(model.get('hasOwnProperty'), false);
   });
 
   QUnit.test('change, hasChanged, changedAttributes, previous, previousAttributes', function(assert) {
@@ -989,8 +994,8 @@
 
   QUnit.test('`previous` for falsey keys', function(assert) {
     assert.expect(2);
-    var model = new Backbone.Model({0: true, '': true});
-    model.set({0: false, '': false}, {silent: true});
+    var model = new Backbone.Model({'0': true, '': true});
+    model.set({'0': false, '': false}, {silent: true});
     assert.equal(model.previous(0), true);
     assert.equal(model.previous(''), true);
   });