diff --git a/package.json b/package.json
index 30d6b90..c70552e 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "brfs": "1.4.1",
     "browserify": "13.3.0",
     "browserify-versionify": "1.0.3",
-    "chai": "3.4.1",
+    "chai": "4.0.0",
     "chai-jquery": "2.0.0",
     "deep-extend": "0.4.0",
     "jquery": "2.2.3",