diff --git a/contract/package-lock.json b/contract/package-lock.json
index 8067299..c4529de 100644
--- a/contract/package-lock.json
+++ b/contract/package-lock.json
@@ -5,9 +5,9 @@
   "requires": true,
   "dependencies": {
     "@openzeppelin/contracts": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-3.0.1.tgz",
-      "integrity": "sha512-uSrD7hZ0ViuHGqHZbeHawZBi/uy7aBiNramXAt2dFFuSuoU4u9insS3V3zdVfOnYSPreUo636xSOuQIFN4//HA=="
+      "version": "4.7.2",
+      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.7.2.tgz",
+      "integrity": "sha512-4n/JL9izql8303mPqPdubuna/DWEMbmOzWYUWyCPhjhiEr2w3nQrjE7vZz1fBF+wzzP6dZbIcsgqACk53c9FGA=="
     },
     "@sindresorhus/is": {
       "version": "0.14.0",
diff --git a/contract/package.json b/contract/package.json
index 700191f..56d6b0b 100644
--- a/contract/package.json
+++ b/contract/package.json
@@ -9,7 +9,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "@openzeppelin/contracts": "^3.0.1"
+    "@openzeppelin/contracts": "^4.7.2"
   },
   "devDependencies": {
     "truffle-hdwallet-provider": "^1.0.17",