diff --git a/package.json b/package.json
index 883bb5d2773b..8fcd6ad636a4 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,7 @@
   "devDependencies": {
     "asar": "^0.11.0",
     "browserify": "^13.1.0",
+    "chai-as-promised": "^7.1.1",
     "check-for-leaks": "^1.0.2",
     "clang-format": "^1.2.3",
     "colors": "^1.1.2",