diff --git a/package.json b/package.json
index 18b7994..30d7615 100644
--- a/package.json
+++ b/package.json
@@ -86,7 +86,7 @@
     "less": "^2.7.2",
     "less-loader": "^4.0.0",
     "mocha": "^3.2.0",
-    "nyc": "^11.0.1",
+    "nyc": "^15.0.0",
     "pre-commit": "^1.2.2",
     "safari-launcher": "^2.0.5",
     "semantic-release": "^6.3.6",