diff --git a/package.json b/package.json
index c39da5f2..415638f0 100644
--- a/package.json
+++ b/package.json
@@ -28,6 +28,7 @@
   "dependencies": {},
   "devDependencies": {
     "chai": "^4.1.1",
+    "coveralls": "^3.0.4",
     "istanbul": "^0.4.5",
     "mocha": "^3.5.0"
   },