diff --git a/package.json b/package.json
index a70525b..44fc4a9 100644
--- a/package.json
+++ b/package.json
@@ -98,7 +98,7 @@
     "mocha": "^5.2.0",
     "mocha-reporter": "^0.1.1",
     "npm-run-all": "^4.1.3",
-    "nyc": "^13.0.1",
+    "nyc": "^15.0.1",
     "semantic-release": "^15.9.17",
     "travis-deploy-once": "^5.0.9",
     "ts-loader": "^5.2.1",