diff --git a/package.json b/package.json
index da22401..c991cc4 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "babel-preset-react": "6.11.1",
     "babel-preset-stage-1": "6.13.0",
     "babel-register": "6.14.0",
-    "chai": "3.5.0",
+    "chai": "4.0.1",
     "chai-enzyme": "0.5.1",
     "cloner": "^0.4.0",
     "coveralls": "2.11.11",