diff --git a/package.json b/package.json
index ba72241..1a64a6f 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "sharedb": "^1.6.0 || ^2.0.0 || ^3.0.0 || ^4.0.0 || ^5.0.0 || ^6.0.0"
   },
   "devDependencies": {
-    "chai": "^4.4.1",
+    "chai": "^6.2.2",
     "mocha": "^10.4.0",
     "ot-json1": "^1.0.2",
     "rich-text": "^4.1.0",