diff --git a/package.json b/package.json
index 341b84e..fbb18d9 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
     },
     "license": "MIT",
     "dependencies": {
-        "@openzeppelin/contracts": "^2.5.0"
+        "@openzeppelin/contracts": "^4.4.2"
     },
     "devDependencies": {
         "chai": "^4.2.0",
diff --git a/yarn.lock b/yarn.lock
index ed97c77..41b0a47 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -146,10 +146,10 @@
     fs-extra "^8.1.0"
     try-require "^1.2.1"
 
-"@openzeppelin/contracts@^2.5.0":
-  version "2.5.1"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-2.5.1.tgz#c76e3fc57aa224da3718ec351812a4251289db31"
-  integrity sha512-qIy6tLx8rtybEsIOAlrM4J/85s2q2nPkDqj/Rx46VakBZ0LwtFhXIVub96LXHczQX0vaqmAueDqNPXtbSXSaYQ==
+"@openzeppelin/contracts@^4.4.2":
+  version "4.4.2"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.4.2.tgz#4e889c9c66e736f7de189a53f8ba5b8d789425c2"
+  integrity sha512-NyJV7sJgoGYqbtNUWgzzOGW4T6rR19FmX1IJgXGdapGPWsuMelGJn9h03nos0iqfforCbCB0iYIR0MtIuIFLLw==
 
 "@openzeppelin/test-helpers@^0.5.6":
   version "0.5.6"