diff --git a/package.json b/package.json
index 01ab97f..58364a2 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
     "babel-preset-es2015": "^6.13.2",
     "coveralls": "^2.11.6",
     "mocha": "^3.0.0",
-    "nyc": "^8.0.0",
+    "nyc": "^9.0.1",
     "rimraf": "^2.5.0",
     "rollup": "^0.36.0",
     "rollup-plugin-babel": "^2.6.0",