diff --git a/package.json b/package.json
index 3ea7b01..faf0e9d 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
   "author": "O3Labs",
   "license": "ISC",
   "dependencies": {
-    "@openzeppelin/contracts": "^4.7.3",
+    "@openzeppelin/contracts": "^4.9.1",
     "@truffle/hdwallet-provider": "^1.5.0",
     "bignumber.js": "^9.0.1",
     "web3": "^1.7.5"
diff --git a/yarn.lock b/yarn.lock
index e8b92c9..52c12f8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -387,10 +387,10 @@
     "@jridgewell/resolve-uri" "^3.0.3"
     "@jridgewell/sourcemap-codec" "^1.4.10"
 
-"@openzeppelin/contracts@^4.7.3":
-  version "4.7.3"
-  resolved "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.7.3.tgz"
-  integrity sha512-dGRS0agJzu8ybo44pCIf3xBaPQN/65AIXNgK8+4gzKd5kbvlqyxryUYVLJv7fK98Seyd2hDZzVEHSWAh0Bt1Yw==
+"@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==
 
 "@sindresorhus/is@^4.6.0":
   version "4.6.0"