diff --git a/package.json b/package.json
index c9c932a..90c709e 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
     "@types/ultra-strftime": "^1.0.3",
     "@typescript-eslint/parser": "^7.14.1",
     "c8": "^10.1.2",
-    "chai": "^5.1.1",
+    "chai": "^6.2.0",
     "coveralls": "^3.1.1",
     "eslint": "^8.57.0",
     "eslint-config-prettier": "^9.1.0",