diff --git a/package.json b/package.json
index 57c4fa3..fac4d00 100644
--- a/package.json
+++ b/package.json
@@ -60,7 +60,7 @@
   "devDependencies": {
     "@types/node": "^25.0.3",
     "benchmark": "^2.1.4",
-    "c8": "^10.1.2",
+    "c8": "^11.0.0",
     "eslint": "^9.17.0",
     "fastify": "^5.0.0",
     "neostandard": "^0.12.0",