diff --git a/package.json b/package.json
index 2e241a4..fef8860 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "@types/mocha": "^10.0.0",
     "@types/node": "^22.15.19",
     "c8": "^10.1.3",
-    "chai": "^5.2.0",
+    "chai": "^6.0.1",
     "chai-as-promised": "^8.0.1",
     "mocha": "^11.4.0",
     "neostandard": "^0.12.0",