diff --git a/package.json b/package.json
index 518e09fba93f5e404cec11cd80a2e0566fe7ec1b..e8679190328fb1f85951632f61e97132de0acbec 100644
--- a/package.json
+++ b/package.json
@@ -42,6 +42,7 @@
   },
   "devDependencies": {
     "@types/chai": "^3.4.35",
+    "@types/chai-as-promised": "0.0.29",
     "@types/mocha": "^2.2.39",
     "chai": "^3.5.0",
     "chai-as-promised": "^6.0.0",