diff --git a/package.json b/package.json
index 2eb037d..28587e3 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
   },
   "dependencies": {
     "@nomiclabs/hardhat-etherscan": "^2.1.0",
-    "@openzeppelin/contracts": "^3.3.0",
+    "@openzeppelin/contracts": "^3.4.2",
     "ramda": "^0.27.1"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index efe668b..f25b343 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -573,10 +573,10 @@
     ethers "^4.0.0-beta.1"
     source-map-support "^0.5.19"
 
-"@openzeppelin/contracts@^3.3.0":
-  version "3.4.1"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-3.4.1.tgz#03c891fec7f93be0ae44ed74e57a122a38732ce7"
-  integrity sha512-cUriqMauq1ylzP2TxePNdPqkwI7Le3Annh4K9rrpvKfSBB/bdW+Iu1ihBaTIABTAAJ85LmKL5SSPPL9ry8d1gQ==
+"@openzeppelin/contracts@^3.4.2":
+  version "3.4.2"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-3.4.2.tgz#d81f786fda2871d1eb8a8c5a73e455753ba53527"
+  integrity sha512-z0zMCjyhhp4y7XKAcDAi3Vgms4T2PstwBdahiO0+9NaGICQKjynK3wduSRplTgk4LXmoO1yfDGO5RbjKYxtuxA==
 
 "@openzeppelin/hardhat-upgrades@^1.6.0":
   version "1.7.0"