diff --git a/package.json b/package.json
index d57bec2..d10d00f 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
   "devDependencies": {
     "@types/js-yaml": "^4.0.5",
     "@types/node": "^18.11.7",
-    "c8": "^8.0.0",
+    "c8": "^9.1.0",
     "chai": "^4.3.6",
     "eslint": "^8.23.1",
     "eslint-config-hexo": "^5.0.0",