diff --git a/package.json b/package.json
index d071878..50c8af5 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
   ],
   "license": "MIT",
   "devDependencies": {
-    "c8": "^8.0.1",
+    "c8": "^9.1.0",
     "chai": "^4.3.7",
     "eslint": "^8.33.0",
     "eslint-config-hexo": "^5.0.0",