diff --git a/package.json b/package.json
index 07a2fbe..39d0036 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     "@types/mocha": "^5.2.5",
     "chai": "^4.2.0",
     "mocha": "^6.0.0",
-    "nyc": "^13.1.0",
+    "nyc": "^15.0.1",
     "rimraf": "^2.6.2",
     "tslint": "^5.11.0",
     "typescript": "^3.2.2"