diff --git a/package.json b/package.json
index e67ed7d..6d21fb8 100644
--- a/package.json
+++ b/package.json
@@ -54,7 +54,7 @@
     "karma-phantomjs-launcher": "^1.0.4",
     "karma-sourcemap-loader": "^0.3.7",
     "karma-webpack": "^2.0.4",
-    "mocha": "^4.0.0",
+    "mocha": "^5.0.0",
     "phantomjs-prebuilt": "^2.1.15",
     "rimraf": "^2.6.1",
     "rollup": "^0.47.4",