diff --git a/contracts/package-lock.json b/contracts/package-lock.json
index cc88ba7..da3b11e 100644
--- a/contracts/package-lock.json
+++ b/contracts/package-lock.json
@@ -3,9 +3,9 @@
 	"lockfileVersion": 1,
 	"dependencies": {
 		"@openzeppelin/contracts": {
-			"version": "3.1.0",
-			"resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-3.1.0.tgz",
-			"integrity": "sha512-dVXDnUKxrAKLzPdCRkz+N8qsVkK1XxJ6kk3zuI6zaQmcKxN7CkizoDP7lXxcs/Mi2I0mxceTRjJBqlzFffLJrQ=="
+			"version": "4.7.2",
+			"resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.7.2.tgz",
+			"integrity": "sha512-4n/JL9izql8303mPqPdubuna/DWEMbmOzWYUWyCPhjhiEr2w3nQrjE7vZz1fBF+wzzP6dZbIcsgqACk53c9FGA=="
 		}
 	}
 }
diff --git a/contracts/package.json b/contracts/package.json
index 1b03de3..10aecec 100644
--- a/contracts/package.json
+++ b/contracts/package.json
@@ -1,6 +1,6 @@
 {
 	"dependencies": {
-		"@openzeppelin/contracts": "3.1.0"
+		"@openzeppelin/contracts": "4.7.2"
 	},
 	"scripts": {
 		"postinstall": "cd scripts && npm install",