diff --git a/coupon/app.js b/coupon/app.js
index 323d5e3..503324d 100644
--- a/coupon/app.js
+++ b/coupon/app.js
@@ -1,4 +1,4 @@
-const assert = require('assert/strict');
+const assert = require('assert');
 const util = require('util');
 
 const express = require('express');