diff --git a/package.json b/package.json
index 8fc9c50..3f9c6a5 100644
--- a/package.json
+++ b/package.json
@@ -49,8 +49,8 @@
     "@types/node": "^18.19.3",
     "@voxpelli/eslint-config": "^19.0.0",
     "@voxpelli/tsconfig": "^10.0.0",
-    "c8": "^8.0.1",
-    "chai": "^4.3.10",
+    "c8": "^9.1.0",
+    "chai": "^5.0.0",
     "eslint": "^8.55.0",
     "eslint-plugin-es-x": "^7.5.0",
     "eslint-plugin-import": "^2.29.1",