diff --git a/package.json b/package.json
index 0a9efb7..2268164 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
   "devDependencies": {
     "browserify": "^13.0.0",
     "esmangle": "^1.0.0",
-    "nyc": "^8.4.0",
+    "nyc": "^9.0.1",
     "remark": "^6.0.0",
     "remark-cli": "^2.0.0",
     "remark-preset-wooorm": "^1.0.0",