diff --git a/blockchain-masterclass/dex-3-frontend/15-all-orders-component/package-lock.json b/blockchain-masterclass/dex-3-frontend/15-all-orders-component/package-lock.json
index a6453cd683..9f1e0a05ae 100644
--- a/blockchain-masterclass/dex-3-frontend/15-all-orders-component/package-lock.json
+++ b/blockchain-masterclass/dex-3-frontend/15-all-orders-component/package-lock.json
@@ -15,9 +15,9 @@
       }
     },
     "@openzeppelin/contracts": {
-      "version": "3.0.0-beta.0",
-      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-3.0.0-beta.0.tgz",
-      "integrity": "sha512-UDYQdvSDjXcnHXBs3QVVoPY2nxpr56cRPN2jo1ahjPsalilr5LPGlCW85zkoHx6AInqm4ZdGnbspgBS5/DvzDw=="
+      "version": "4.7.2",
+      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.7.2.tgz",
+      "integrity": "sha512-4n/JL9izql8303mPqPdubuna/DWEMbmOzWYUWyCPhjhiEr2w3nQrjE7vZz1fBF+wzzP6dZbIcsgqACk53c9FGA=="
     },
     "@openzeppelin/test-helpers": {
       "version": "0.5.5",
diff --git a/blockchain-masterclass/dex-3-frontend/15-all-orders-component/package.json b/blockchain-masterclass/dex-3-frontend/15-all-orders-component/package.json
index a5f192bf4c..5c1ff232d4 100644
--- a/blockchain-masterclass/dex-3-frontend/15-all-orders-component/package.json
+++ b/blockchain-masterclass/dex-3-frontend/15-all-orders-component/package.json
@@ -13,7 +13,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "@openzeppelin/contracts": "^3.0.0-beta.0",
+    "@openzeppelin/contracts": "^4.7.2",
     "@openzeppelin/test-helpers": "^0.5.5"
   }
 }