diff --git a/package.json b/package.json
index 4d415ec8..0f45c0f9 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "@nomiclabs/hardhat-truffle5": "^2.0.3",
     "@nomiclabs/hardhat-web3": "^2.0.0",
     "@openzeppelin/contracts": "3.4.1",
-    "@openzeppelin/contracts-upgradeable": "3.4.1",
+    "@openzeppelin/contracts-upgradeable": "4.7.3",
     "@openzeppelin/hardhat-upgrades": "^1.12.0",
     "@openzeppelin/test-helpers": "^0.5.15",
     "chai": "^4.3.4",
diff --git a/yarn.lock b/yarn.lock
index 94699c54..c1fa7009 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -634,10 +634,10 @@
     find-up "^4.1.0"
     fs-extra "^8.1.0"
 
-"@openzeppelin/contracts-upgradeable@3.4.1":
-  version "3.4.1"
-  resolved "https://registry.npmjs.org/@openzeppelin/contracts-upgradeable/-/contracts-upgradeable-3.4.1.tgz"
-  integrity sha512-wBGlUzEkOxcj/ghtcF2yKc8ZYh+PTUtm1mK38zoENulJ6aplij7eH8quo3lMugfzPJy+V6V5qI8QhdQmCn7hkQ==
+"@openzeppelin/contracts-upgradeable@4.7.3":
+  version "4.7.3"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts-upgradeable/-/contracts-upgradeable-4.7.3.tgz#f1d606e2827d409053f3e908ba4eb8adb1dd6995"
+  integrity sha512-+wuegAMaLcZnLCJIvrVUDzA9z/Wp93f0Dla/4jJvIhijRrPabjQbZe6fWiECLaJyfn5ci9fqf9vTw3xpQOad2A==
 
 "@openzeppelin/contracts@3.4.1":
   version "3.4.1"