diff --git a/package.json b/package.json
index 443ed2e..c2ec7fe 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,7 @@
   ],
   "devDependencies": {
     "benchmark": "^2.1.4",
-    "c8": "^11.0.0",
+    "c8": "^12.0.0",
     "eslint": "^9.17.0",
     "jest": "^30.0.3",
     "neostandard": "^0.13.0",