diff --git a/lib/index.js b/lib/index.js
index 5495c0a..8601b55 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -1,49 +1,54 @@
 'use strict';
 
-//var request;
-
 var defaults = {};
+var _memdb = {};
 
 module.exports.create = function(config) {
-	var memdb = config.cache || {};
+	var memdb = config.cache || _memdb;
 
 	return {
 		init: function(opts) {
 			//request = opts.request;
-			return null;
+			return Promise.resolve(null);
 		},
 
 		set: function(data) {
-			// console.log('Add Key Auth URL', data);
+			return Promise.resolve().then(function() {
+				// console.log('Add Key Auth URL', data);
 
-			var ch = data.challenge;
-			var key = ch.identifier.value + '#' + ch.token;
-			memdb[key] = ch.keyAuthorization;
+				var ch = data.challenge;
+				var key = ch.identifier.value + '#' + ch.token;
+				memdb[key] = ch.keyAuthorization;
 
-			return null;
+				return null;
+			});
 		},
 
 		get: function(data) {
-			// console.log('List Key Auth URL', data);
+			return Promise.resolve().then(function() {
+				// console.log('List Key Auth URL', data);
 
-			var ch = data.challenge;
-			var key = ch.identifier.value + '#' + ch.token;
+				var ch = data.challenge;
+				var key = ch.identifier.value + '#' + ch.token;
 
-      if (memdb[key]) {
-        return { keyAuthorization: memdb[key] };
-      }
+				if (memdb[key]) {
+					return { keyAuthorization: memdb[key] };
+				}
 
-			return null;
+				return null;
+			});
 		},
 
 		remove: function(data) {
-			// console.log('Remove Key Auth URL', data);
+			return Promise.resolve().then(function() {
+				// console.log('Remove Key Auth URL', data);
 
-			var ch = data.challenge;
-			var key = ch.identifier.value + '#' + ch.token;
+				var ch = data.challenge;
+				var key = ch.identifier.value + '#' + ch.token;
 
-			delete memdb[key];
-			return null;
+				delete memdb[key];
+				return null;
+			});
 		}
 	};
 };
diff --git a/package.json b/package.json
index 94055c5..8e3a16c 100644
--- a/package.json
+++ b/package.json
@@ -1,9 +1,10 @@
 {
 	"name": "acme-http-01-standalone",
-	"version": "3.0.0",
+	"version": "3.0.5",
 	"description": "HTTP Authentication (In-Memory) for Let's Encrypt for Node.js - ACME http-01 challenges w/ ACME.js and Greenlock.js",
 	"main": "index.js",
 	"files": [
+		"*.js",
 		"lib",
 		"test.js"
 	],