diff --git a/package.json b/package.json
index 5e552f2..ae31658 100644
--- a/package.json
+++ b/package.json
@@ -53,7 +53,7 @@
     }
   ],
   "devDependencies": {
-    "c8": "^10.1.3",
+    "c8": "^11.0.0",
     "eslint": "^9.17.0",
     "fastify": "^5.0.0",
     "neostandard": "^0.12.0",