diff --git a/package.json b/package.json
index 9bee94e..fae45b8 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
     "memfs": "^4.2.0"
   },
   "devDependencies": {
-    "c8": "^7.10.0",
+    "c8": "^8.0.0",
     "clean-webpack-plugin": "^4.0.0",
     "eslint": "^7.12.0",
     "eslint-config-standard": "^16.0.3",