diff --git a/package-lock.json b/package-lock.json
index 80b79a2..0e3b7b2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -239,9 +239,9 @@
       }
     },
     "@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=="
     },
     "@resolver-engine/core": {
       "version": "0.3.3",
diff --git a/package.json b/package.json
index 93fca99..f9de85a 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
   "license": "ISC",
   "dependencies": {
     "@nomiclabs/buidler": "^1.3.6",
-    "@openzeppelin/contracts": "^3.0.2",
+    "@openzeppelin/contracts": "^4.7.2",
     "create-react-app": "^3.4.1",
     "dotenv": "^8.2.0"
   },