diff --git a/package.json b/package.json
index 8dfb907..e763e19 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
     "babel-plugin-transform-runtime": "^6.4.0",
     "babel-preset-es2015": "^6.1.18",
     "babel-preset-stage-0": "^6.1.18",
-    "chai": "^3.2.0",
+    "chai": "^4.0.1",
     "chai-as-promised": "^5.0.0",
     "eslint": "^2.2.0",
     "eslint-config-exchange-solutions": "6.0.0",