diff --git a/package.json b/package.json
index c64de55..1e82695 100644
--- a/package.json
+++ b/package.json
@@ -69,7 +69,7 @@
     "@fastify/websocket": "^11.0.1",
     "@hotwired/turbo": "^8.0.10",
     "@types/node": "^26.0.0",
-    "c8": "^11.0.0",
+    "c8": "^12.0.0",
     "eslint": "^9.17.0",
     "fastify": "^5.0.0",
     "mqemitter": "^7.0.0",