diff --git a/package.json b/package.json
index 09f1b60..15ee385 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "jshint": "^2.8.0",
     "liquid.js": "^1.3.2",
     "marked": "^0.3.5",
-    "mocha": "^3.5.0",
+    "mocha": "^4.0.0",
     "mock-spawn": "^0.2.6",
     "sinon": "^1.15.4",
     "sinon-chai": "^2.8.0",