diff --git a/lib/BulkHtmlLoader.js b/lib/BulkHtmlLoader.js
index 6360f4a..7f10e88 100644
--- a/lib/BulkHtmlLoader.js
+++ b/lib/BulkHtmlLoader.js
@@ -128,9 +128,9 @@ BulkHtmlLoader.prototype = {
         q.concurrency = that._maxConcurrentConnections;
 
         // Final callback when queue completes
-        q.drain = function() {
+        q.drain(function() {
             callback(null, that._queue);
-        };
+        });
 
         q.push(queue);
         return that;
diff --git a/package.json b/package.json
index 815d738..2a9183d 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
   ],
   "license": "MIT",
   "dependencies": {
-    "async": "^2.1.4",
+    "async": "^3.0.0",
     "bluebird": "^3.4.7",
     "cheerio": "^0.22.0",
     "lodash": "^4.17.4",