diff --git a/package-lock.json b/package-lock.json
index b877767..24c0513 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -253,9 +253,9 @@
       }
     },
     "@openzeppelin/contracts": {
-      "version": "3.0.0-beta.0",
-      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-3.0.0-beta.0.tgz",
-      "integrity": "sha512-UDYQdvSDjXcnHXBs3QVVoPY2nxpr56cRPN2jo1ahjPsalilr5LPGlCW85zkoHx6AInqm4ZdGnbspgBS5/DvzDw==",
+      "version": "4.7.2",
+      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.7.2.tgz",
+      "integrity": "sha512-4n/JL9izql8303mPqPdubuna/DWEMbmOzWYUWyCPhjhiEr2w3nQrjE7vZz1fBF+wzzP6dZbIcsgqACk53c9FGA==",
       "dev": true
     },
     "@resolver-engine/core": {
diff --git a/package.json b/package.json
index f359b9b..5a4272d 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "@types/chai": "4.1.3",
     "@types/lowdb": "^1.0.9",
     "@types/node": "^12.12.14",
-    "@openzeppelin/contracts": "3.0.0-beta.0",
+    "@openzeppelin/contracts": "4.7.2",
     "ethereum-waffle": "2.4.0",
     "buidler-typechain": "0.0.5",
     "chai": "4.2.0",