diff --git a/package.json b/package.json
index e2b5549..7630aa4 100644
--- a/package.json
+++ b/package.json
@@ -61,7 +61,7 @@
   },
   "devDependencies": {
     "@types/node": "^26.0.0",
-    "c8": "^11.0.0",
+    "c8": "^12.0.0",
     "cross-env": "^10.0.0",
     "eslint": "^9.17.0",
     "fastify": "^5.0.0",