diff --git a/package.json b/package.json
index 11137f80..9d1ac140 100644
--- a/package.json
+++ b/package.json
@@ -82,7 +82,7 @@
     "@gnosis.pm/owl-token": "^4.0.0",
     "@gnosis.pm/solidity-data-structures": "1.3.5",
     "@gnosis.pm/util-contracts": "2.0.7",
-    "@openzeppelin/contracts": "=2.5.1",
+    "@openzeppelin/contracts": "=4.2.0",
     "@truffle/contract": "^4.3.9",
     "@typechain/truffle-v5": "^2.0.2",
     "@typechain/web3-v1": "^1.0.0",
diff --git a/yarn.lock b/yarn.lock
index 5c588d0e..7db8f036 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -526,10 +526,10 @@
     "@nodelib/fs.scandir" "2.1.3"
     fastq "^1.6.0"
 
-"@openzeppelin/contracts@=2.5.1":
-  version "2.5.1"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-2.5.1.tgz#c76e3fc57aa224da3718ec351812a4251289db31"
-  integrity sha512-qIy6tLx8rtybEsIOAlrM4J/85s2q2nPkDqj/Rx46VakBZ0LwtFhXIVub96LXHczQX0vaqmAueDqNPXtbSXSaYQ==
+"@openzeppelin/contracts@=4.2.0":
+  version "4.2.0"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.2.0.tgz#260d921d99356e48013d9d760caaa6cea35dc642"
+  integrity sha512-LD4NnkKpHHSMo5z9MvFsG4g1xxZUDqV3A3Futu3nvyfs4wPwXxqOgMaxOoa2PeyGL2VNeSlbxT54enbQzGcgJQ==
 
 "@resolver-engine/core@^0.2.1":
   version "0.2.1"