diff --git a/package.json b/package.json
index d7c0bf3..4f452f0 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
   "author": "jason@wildcards.worldh",
   "license": "MIT",
   "dependencies": {
-    "@openzeppelin/contracts": "^2.5.0",
+    "@openzeppelin/contracts": "^4.7.2",
     "@openzeppelin/contracts-ethereum-package": "^2.2.3",
     "@openzeppelin/upgrades": "^2.5.3",
     "@truffle/hdwallet-provider": "^1.0.33",
diff --git a/yarn.lock b/yarn.lock
index 4344b3e..a36b7ce 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -509,10 +509,10 @@
   resolved "https://registry.yarnpkg.com/@openzeppelin/contracts-ethereum-package/-/contracts-ethereum-package-2.4.0.tgz#cd98612022cadb8710c26901bc564240a19a9b40"
   integrity sha512-GC1aOgTnuNnlhdYOCKFizLCQRgYlbImWi+aJ9Lw4Yw4BSLHzfPg+XV0tgn9l+KnFAzgoUEg2aD2wmaHZBjEnSw==
 
-"@openzeppelin/contracts@^2.5.0":
-  version "2.5.0"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-2.5.0.tgz#e327a98ba1d26b7756ff62885a0aa0967a375449"
-  integrity sha512-t3jm8FrhL9tkkJTofkznTqo/XXdHi21w5yXwalEnaMOp22ZwZ0f/mmKdlgMMLPFa6bSVHbY88mKESwJT/7m5Lg==
+"@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==
 
 "@openzeppelin/fuzzy-solidity-import-parser@^0.1.2":
   version "0.1.2"