diff --git a/package.json b/package.json
index aab7931..874a935 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,7 @@
   },
   "devDependencies": {
     "@types/body-parser": "1.16.1",
-    "@types/chai": "^3.4.34",
+    "@types/chai": "^4.0.2",
     "@types/express": "^4.0.33",
     "@types/express-serve-static-core": "^4.0.36",
     "@types/method-override": "0.0.29",