diff --git a/package.json b/package.json
index 59804c2..dc10476 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "request": "~2.81.0"
   },
   "devDependencies": {
-    "chai": "~4.0.1",
+    "chai": "~4.1.0",
     "coffee-script": "~1.12.5",
     "espower-coffee": "~1.1.0",
     "hubot": ">= 2.7",