diff --git a/package.json b/package.json
index d6e69ff..4d6d10b 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "devDependencies": {
     "@nomiclabs/hardhat-ethers": "^2.0.2",
     "@nomiclabs/hardhat-waffle": "^2.0.1",
-    "@openzeppelin/contracts": "^4.3.0",
+    "@openzeppelin/contracts": "^4.7.1",
     "@types/chai": "^4.2.21",
     "@types/mocha": "^9.0.0",
     "@types/node": "^16.7.1",
diff --git a/yarn.lock b/yarn.lock
index c2f2aa3..0cde287 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -560,10 +560,10 @@
     "@types/sinon-chai" "^3.2.3"
     "@types/web3" "1.0.19"
 
-"@openzeppelin/contracts@^4.3.0":
-  version "4.3.0"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.3.0.tgz#345236d4ec73ef381ab4907c6ef66fd55e5dedad"
-  integrity sha512-+uBDl/TrmR0Kch6mq3tuxMex/fK7huR6+fQMae+zJk1K5T+dp0pFl12Hbc+1L6oYMXoyDSBJ8zqhRIntrREDFA==
+"@openzeppelin/contracts@^4.7.1":
+  version "4.7.1"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.7.1.tgz#33d0a857b76b18d313e6bb6ed28cdaf367e90cfe"
+  integrity sha512-UXmAjKARsXORHlHZu5GCD7ZbRKm6nU8UHnbuT/QJJa2JEOEcbvV/X8w/sUk62Sl9VZuuljM1akrZLyAtzUgsxw==
 
 "@resolver-engine/core@^0.3.3":
   version "0.3.3"