diff --git a/package.json b/package.json
index b11fc10..0654bc6 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "@openzeppelin/contracts": "^3.4.1",
+    "@openzeppelin/contracts": "^4.4.2",
     "@truffle/contract": "^4.0.39",
     "@truffle/hdwallet-provider": "^1.0.24",
     "axios": "^0.19.0",
diff --git a/yarn.lock b/yarn.lock
index 01e43bd..09adb6f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1143,10 +1143,10 @@
     "@nodelib/fs.scandir" "2.1.4"
     fastq "^1.6.0"
 
-"@openzeppelin/contracts@^3.4.1":
-  version "3.4.1"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-3.4.1.tgz#03c891fec7f93be0ae44ed74e57a122a38732ce7"
-  integrity sha512-cUriqMauq1ylzP2TxePNdPqkwI7Le3Annh4K9rrpvKfSBB/bdW+Iu1ihBaTIABTAAJ85LmKL5SSPPL9ry8d1gQ==
+"@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==
 
 "@protobufjs/aspromise@^1.1.1", "@protobufjs/aspromise@^1.1.2":
   version "1.1.2"