diff --git a/package.json b/package.json
index 5a6df6c..af1e1d2 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
     "verifywcc": "npx buidler verify-contract --contract-name WrappedCoffeeCoin --address 0x7dA7ee7c0655017F29AC1b883097b33B31b1c7D1"
   },
   "dependencies": {
-    "@openzeppelin/contracts": "^2.4.0",
+    "@openzeppelin/contracts": "^4.4.2",
     "scrypt": "^6.0.3"
   },
   "devDependencies": {
diff --git a/yarn.lock b/yarn.lock
index d2b8110..549f7f8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -115,10 +115,10 @@
     safe-buffer "^5.1.1"
     util.promisify "^1.0.0"
 
-"@openzeppelin/contracts@^2.4.0":
-  version "2.4.0"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-2.4.0.tgz#7270f79ed1463370fe6e664d36a779aa4d3ee896"
-  integrity sha512-xeKP59REgow5TPBJh3S9BRIm7DDG+Rz3Nt4ANWGUkjk4305DHpyUD5CyMJ6nd2JMmZuFyx4mjvvlCtSJLRnN6w==
+"@openzeppelin/contracts@^4.4.2":
+  version "4.4.2"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.4.2.tgz#4e889c9c66e736f7de189a53f8ba5b8d789425c2"
+  integrity sha512-NyJV7sJgoGYqbtNUWgzzOGW4T6rR19FmX1IJgXGdapGPWsuMelGJn9h03nos0iqfforCbCB0iYIR0MtIuIFLLw==
 
 "@resolver-engine/core@^0.3.3":
   version "0.3.3"