diff --git a/package-lock.json b/package-lock.json
index db2d587..0dda5d6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5102,9 +5102,9 @@
       }
     },
     "@openzeppelin/contracts": {
-      "version": "2.5.1",
-      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-2.5.1.tgz",
-      "integrity": "sha512-qIy6tLx8rtybEsIOAlrM4J/85s2q2nPkDqj/Rx46VakBZ0LwtFhXIVub96LXHczQX0vaqmAueDqNPXtbSXSaYQ==",
+      "version": "4.4.2",
+      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.4.2.tgz",
+      "integrity": "sha512-NyJV7sJgoGYqbtNUWgzzOGW4T6rR19FmX1IJgXGdapGPWsuMelGJn9h03nos0iqfforCbCB0iYIR0MtIuIFLLw==",
       "dev": true
     },
     "@openzeppelin/test-helpers": {
diff --git a/package.json b/package.json
index 6201e5f..d3c43cc 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
     "@nomiclabs/hardhat-truffle5": "^2.0.0",
     "@nomiclabs/hardhat-waffle": "^2.0.1",
     "@nomiclabs/hardhat-web3": "^2.0.0",
-    "@openzeppelin/contracts": "^2.5.1",
+    "@openzeppelin/contracts": "^4.4.2",
     "@openzeppelin/test-helpers": "^0.5.9",
     "@typechain/truffle-v5": "^2.0.2",
     "@typechain/web3-v1": "^1.0.0",