diff --git a/packages/iocuak-e2e/package.json b/packages/iocuak-e2e/package.json
index 2a62a1a7..e8613db5 100644
--- a/packages/iocuak-e2e/package.json
+++ b/packages/iocuak-e2e/package.json
@@ -15,7 +15,7 @@
   "dependencies": {
     "@cuaklabs/iocuak": "workspace:*",
     "@cucumber/cucumber": "11.0.1",
-    "chai": "4.5.0",
+    "chai": "5.1.2",
     "reflect-metadata": "0.2.2",
     "sinon": "19.0.2",
     "sinon-chai": "3.7.0"
@@ -24,7 +24,7 @@
     "@eslint/js": "9.13.0",
     "@rollup/plugin-multi-entry": "6.0.1",
     "@rollup/plugin-typescript": "12.1.1",
-    "@types/chai": "4.3.20",
+    "@types/chai": "5.0.1",
     "@types/sinon": "17.0.3",
     "@types/sinon-chai": "3.2.12",
     "@typescript-eslint/eslint-plugin": "8.11.0",