diff --git a/package.json b/package.json
index 8a17063..36c2389 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
   ],
   "devDependencies": {
     "@prettier/html-tags": "^2.2.0",
-    "c8": "11.0.0",
+    "c8": "12.0.0",
     "cheerio": "1.2.0",
     "outdent": "0.8.0",
     "prettier": "3.8.3",