diff --git a/package.json b/package.json
index eef2d7b..dddcde9 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
   "description": "Unit tests for chatbot dialogs",
   "main": "botbuilder-unit.js",
   "dependencies": {
+    "async": "^1.5.2",
     "botbuilder": "^3.8.2",
     "colors": "^1.1.2"
   },