diff --git a/package.json b/package.json
index 67c5949..f8bcdbc 100644
--- a/package.json
+++ b/package.json
@@ -34,8 +34,8 @@
     "@types/chai": "^4.3.11",
     "@types/chai-as-promised": "^7.1.8",
     "@types/mocha": "^10.0.6",
-    "c8": "^8.0.1",
-    "chai": "^4.4.1",
+    "c8": "^9.1.0",
+    "chai": "^5.0.0",
     "chai-as-promised": "^7.1.1",
     "eslint-formatter-gha": "^1.4.3",
     "eslint-plugin-mocha": "^10.2.0",