diff --git a/package.json b/package.json
index b30078ea..cd00c4b2 100644
--- a/package.json
+++ b/package.json
@@ -101,7 +101,7 @@
     "@types/ws": "^8.2.0",
     "@typescript-eslint/eslint-plugin": "^6.0.0",
     "@typescript-eslint/parser": "^6.0.0",
-    "c8": "^8.0.0",
+    "c8": "^9.0.0",
     "concat-stream": "^2.0.0",
     "delay": "^6.0.0",
     "dotenv": "^16.0.0",