diff --git a/package.json b/package.json
index b3a8d82..ae65086 100644
--- a/package.json
+++ b/package.json
@@ -57,7 +57,7 @@
   "dependencies": {
     "@opengsn/contracts": "2.2.2",
     "@opengsn/provider": "2.2.2",
-    "@openzeppelin/contracts": "4.5.0",
+    "@openzeppelin/contracts": "4.7.3",
     "truffle-hdwallet-provider": "^1.0.17"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 21e9ec5..edbbd22 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1361,10 +1361,10 @@
     ethereumjs-util "^6.2.1"
     nedb-async "^0.1.3"
 
-"@openzeppelin/contracts@4.5.0":
-  version "4.5.0"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.5.0.tgz#3fd75d57de172b3743cdfc1206883f56430409cc"
-  integrity sha512-fdkzKPYMjrRiPK6K4y64e6GzULR7R7RwxSigHS8DDp7aWDeoReqsQI+cxHV1UuhAqX69L1lAaWDxenfP+xiqzA==
+"@openzeppelin/contracts@4.7.3":
+  version "4.7.3"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.7.3.tgz#939534757a81f8d69cc854c7692805684ff3111e"
+  integrity sha512-dGRS0agJzu8ybo44pCIf3xBaPQN/65AIXNgK8+4gzKd5kbvlqyxryUYVLJv7fK98Seyd2hDZzVEHSWAh0Bt1Yw==
 
 "@openzeppelin/contracts@^3.4.0-solc-0.7":
   version "3.4.1"