diff --git a/package.json b/package.json
index 6d18348e..13eead9b 100644
--- a/package.json
+++ b/package.json
@@ -66,7 +66,7 @@
     "less-loader": "^2.2.3",
     "lint-staged": "^3.6.1",
     "mocha": "^3.4.2",
-    "nyc": "^10.1.2",
+    "nyc": "^15.0.0",
     "openurl": "^1.1.1",
     "postcss-loader": "^1.3.3",
     "prettier": "1.7.4",