diff --git a/package.json b/package.json
index 4825091..28a06a7 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
     "@babel/core": "^7.14.3",
     "@babel/preset-env": "^7.14.2",
     "@babel/register": "^7.13.16",
-    "@openzeppelin/contracts": "2.5.0",
+    "@openzeppelin/contracts": "4.7.2",
     "core-js": "^3.12.1",
     "ethereumjs-util": "^7.0.10",
     "lodash": "^4.17.4",
diff --git a/yarn.lock b/yarn.lock
index 0f934db..11b9dc7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1616,10 +1616,10 @@
     "@nodelib/fs.scandir" "2.1.4"
     fastq "^1.6.0"
 
-"@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==
 
 "@protobufjs/aspromise@^1.1.1", "@protobufjs/aspromise@^1.1.2":
   version "1.1.2"