diff --git a/package.json b/package.json
index b079caa..0221c59 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "chai": "^3.5.0",
     "eslint": "^3.7.1",
     "eyeglass": "^1.1.2",
-    "mocha": "^3.1.2",
+    "mocha": "^4.0.0",
     "node-sass-import-once": "^1.2.0",
     "sassy-test": "^3.0.0",
     "support-for": "^1.0.0"