diff --git a/package.json b/package.json
index 9535b5c..b62d9a3 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "superagent": "^3.3.2"
   },
   "devDependencies": {
-    "chai": "^3.2.0",
+    "chai": "^4.0.1",
     "eslint": "^3.0.0",
     "eslint-config-habitrpg": "^3.0.0",
     "eslint-plugin-mocha": "^4.7.0",