diff --git a/package.json b/package.json
index e76893c..c48f0bb 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
     "jshint": "^2.10.1",
     "mocha": "^6.0.2",
     "mocha-chrome": "^2.0.0",
-    "nyc": "15.1.0",
+    "nyc": "18.0.0",
     "uglify-js": "^3.4.9",
     "unexpected": "13.2.1"
   },