diff --git a/package.json b/package.json
index 2123098..87fe9bb 100644
--- a/package.json
+++ b/package.json
@@ -39,6 +39,6 @@
     "typescript": "^3.9.5"
   },
   "dependencies": {
-    "@openzeppelin/contracts": "^2.5.1"
+    "@openzeppelin/contracts": "^4.7.2"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 30c9344..3acfa50 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -176,10 +176,10 @@
     fs-extra "^8.1.0"
     try-require "^1.2.1"
 
-"@openzeppelin/contracts@^2.5.1":
-  version "2.5.1"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-2.5.1.tgz#c76e3fc57aa224da3718ec351812a4251289db31"
-  integrity sha512-qIy6tLx8rtybEsIOAlrM4J/85s2q2nPkDqj/Rx46VakBZ0LwtFhXIVub96LXHczQX0vaqmAueDqNPXtbSXSaYQ==
+"@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/test-helpers@^0.5.6":
   version "0.5.6"