diff --git a/package.json b/package.json
index 701f072..066acec 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
     "lodash.memoize": "^4.1.2",
     "memoize-one": "^5.0.4",
     "mocha": "^5.2.0",
-    "nyc": "^12.0.1",
+    "nyc": "^15.0.1",
     "proxy-polyfill": "^0.3.0",
     "sinon": "^5.0.10",
     "size-limit": "^0.21.1"