diff --git a/package-lock.json b/package-lock.json
index 1d43d31..dea7637 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -34,9 +34,9 @@
       }
     },
     "@openzeppelin/contracts": {
-      "version": "2.4.0",
-      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-2.4.0.tgz",
-      "integrity": "sha512-xeKP59REgow5TPBJh3S9BRIm7DDG+Rz3Nt4ANWGUkjk4305DHpyUD5CyMJ6nd2JMmZuFyx4mjvvlCtSJLRnN6w=="
+      "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": "0.2.1",
diff --git a/package.json b/package.json
index 85102b2..b068b6b 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
   },
   "license": "MIT",
   "dependencies": {
-    "@openzeppelin/contracts": "^2.4.0"
+    "@openzeppelin/contracts": "^4.7.2"
   },
   "devDependencies": {
     "chai": "^4.2.0",
diff --git a/yarn.lock b/yarn.lock
index e08d18c..7cce57f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -25,10 +25,10 @@
   dependencies:
     regenerator-runtime "^0.13.2"
 
-"@openzeppelin/contracts@^2.4.0":
-  version "2.4.0"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-2.4.0.tgz#7270f79ed1463370fe6e664d36a779aa4d3ee896"
-  integrity sha512-xeKP59REgow5TPBJh3S9BRIm7DDG+Rz3Nt4ANWGUkjk4305DHpyUD5CyMJ6nd2JMmZuFyx4mjvvlCtSJLRnN6w==
+"@openzeppelin/contracts@^4.7.2":
+  version "4.7.2"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.7.2.tgz#7587416fe2d35abf574193515b8971bfe9f64bc7"
+  integrity sha512-4n/JL9izql8303mPqPdubuna/DWEMbmOzWYUWyCPhjhiEr2w3nQrjE7vZz1fBF+wzzP6dZbIcsgqACk53c9FGA==
 
 "@resolver-engine/core@^0.2.1":
   version "0.2.1"