diff --git a/package-lock.json b/package-lock.json
index 5fa986d..7ddbb44 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -500,9 +500,9 @@
       }
     },
     "@openzeppelin/contracts": {
-      "version": "2.5.1",
-      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-2.5.1.tgz",
-      "integrity": "sha512-qIy6tLx8rtybEsIOAlrM4J/85s2q2nPkDqj/Rx46VakBZ0LwtFhXIVub96LXHczQX0vaqmAueDqNPXtbSXSaYQ=="
+      "version": "4.7.2",
+      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.7.2.tgz",
+      "integrity": "sha512-4n/JL9izql8303mPqPdubuna/DWEMbmOzWYUWyCPhjhiEr2w3nQrjE7vZz1fBF+wzzP6dZbIcsgqACk53c9FGA=="
     },
     "@openzeppelin/contracts-ethereum-package": {
       "version": "2.5.0",
diff --git a/package.json b/package.json
index f8c8694..332e30a 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
   "dependencies": {
     "@ledgerhq/web3-subprovider": "^5.13.1",
     "@openzeppelin/cli": "^2.8.1",
-    "@openzeppelin/contracts": "^2.5.0",
+    "@openzeppelin/contracts": "^4.7.2",
     "@openzeppelin/contracts-ethereum-package": "^2.5.0",
     "@openzeppelin/upgrades": "^2.8.0",
     "@truffle/hdwallet-provider": "^1.1.0",