diff --git a/package-lock.json b/package-lock.json
index 262b04a..75f1178 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -120,9 +120,9 @@
       }
     },
     "@openzeppelin/contracts": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-3.0.2.tgz",
-      "integrity": "sha512-eK9F3jEbjQeRYLiqrHUrXCZBxE+7L4Ve5scYInsLezuasoFkrrEFlnDWD8gbN+6e5NgdgJP9fTWxjxWmaHh7dA=="
+      "version": "4.7.2",
+      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.7.2.tgz",
+      "integrity": "sha512-4n/JL9izql8303mPqPdubuna/DWEMbmOzWYUWyCPhjhiEr2w3nQrjE7vZz1fBF+wzzP6dZbIcsgqACk53c9FGA=="
     },
     "@sindresorhus/is": {
       "version": "0.14.0",
diff --git a/package.json b/package.json
index f4a7222..3443c41 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "@openzeppelin/contracts": "^3.0.2",
+    "@openzeppelin/contracts": "^4.7.2",
     "web3": "^1.2.8"
   }
 }