diff --git a/package.json b/package.json
index a7d80cc..687178b 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "hardhat": "^2.9.3"
   },
   "dependencies": {
-    "@openzeppelin/contracts": "^4.8.3",
+    "@openzeppelin/contracts": "^4.9.1",
     "dotenv": "^16.0.0"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index d9cf898..464232e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -532,10 +532,10 @@
     "@types/sinon-chai" "^3.2.3"
     "@types/web3" "1.0.19"
 
-"@openzeppelin/contracts@^4.8.3":
-  version "4.8.3"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.8.3.tgz#cbef3146bfc570849405f59cba18235da95a252a"
-  integrity sha512-bQHV8R9Me8IaJoJ2vPG4rXcL7seB7YVuskr4f+f5RyOStSZetwzkWtoqDMl5erkBJy0lDRUnIR2WIkPiC0GJlg==
+"@openzeppelin/contracts@^4.9.1":
+  version "4.9.1"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.9.1.tgz#afa804d2c68398704b0175acc94d91a54f203645"
+  integrity sha512-aLDTLu/If1qYIFW5g4ZibuQaUsFGWQPBq1mZKp/txaebUnGHDmmiBhRLY1tDNedN0m+fJtKZ1zAODS9Yk+V6uA==
 
 "@resolver-engine/core@^0.3.3":
   version "0.3.3"