diff --git a/package.json b/package.json
index 0c66c48..07895de 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "semver": "^7.5.4"
   },
   "devDependencies": {
-    "c8": "^11.0.0",
+    "c8": "^12.0.0",
     "eslint": "^9.17.0",
     "neostandard": "^0.13.0"
   }