diff --git a/package.json b/package.json
index a43ca0e..ea83fe1 100644
--- a/package.json
+++ b/package.json
@@ -82,7 +82,7 @@
     "eslint-plugin-prettier": "^3.1.4",
     "mocha": "^8.1.3",
     "mocked-env": "^1.3.2",
-    "nyc": "^15.1.0",
+    "nyc": "^18.0.0",
     "prettier": "^2.0.5",
     "ts-loader": "^9.6.2",
     "ts-node": "^10.9.2",