diff --git a/package.json b/package.json
index 4634d42..f3927cb 100644
--- a/package.json
+++ b/package.json
@@ -92,8 +92,8 @@
     "@types/chai": "^4.2.14",
     "@types/mocha": "^10.0.1",
     "@types/node": "^20.10.5",
+    "c8": "^9.1.0",
     "@typescript-eslint/eslint-plugin": "^7.4.0",
-    "c8": "^8.0.1",
     "chai": "^5.1.0",
     "eslint": "^8.56.0",
     "eslint-plugin-fp": "^2.3.0",