diff --git a/node_modules/async/mapLimit.js b/node_modules/async/mapLimit.js
new file mode 100644
index 0000000..3ed1fad
--- /dev/null
+++ b/node_modules/async/mapLimit.js
@@ -0,0 +1,37 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+
+var _doParallelLimit = require('./internal/doParallelLimit');
+
+var _doParallelLimit2 = _interopRequireDefault(_doParallelLimit);
+
+var _map = require('./internal/map');
+
+var _map2 = _interopRequireDefault(_map);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+/**
+ * The same as [`map`]{@link module:Collections.map} but runs a maximum of `limit` async operations at a time.
+ *
+ * @name mapLimit
+ * @static
+ * @memberOf module:Collections
+ * @method
+ * @see [async.map]{@link module:Collections.map}
+ * @category Collection
+ * @param {Array|Iterable|Object} coll - A collection to iterate over.
+ * @param {number} limit - The maximum number of async operations at a time.
+ * @param {AsyncFunction} iteratee - An async function to apply to each item in
+ * `coll`.
+ * The iteratee should complete with the transformed item.
+ * Invoked with (item, callback).
+ * @param {Function} [callback] - A callback which is called when all `iteratee`
+ * functions have finished, or an error occurs. Results is an array of the
+ * transformed items from the `coll`. Invoked with (err, results).
+ */
+exports.default = (0, _doParallelLimit2.default)(_map2.default);
+module.exports = exports['default'];