diff --git a/package-lock.json b/package-lock.json
index 7b72357..f4cf50c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -46,9 +46,9 @@
       }
     },
     "@openzeppelin/contracts": {
-      "version": "2.5.0",
-      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-2.5.0.tgz",
-      "integrity": "sha512-t3jm8FrhL9tkkJTofkznTqo/XXdHi21w5yXwalEnaMOp22ZwZ0f/mmKdlgMMLPFa6bSVHbY88mKESwJT/7m5Lg=="
+      "version": "4.7.2",
+      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.7.2.tgz",
+      "integrity": "sha512-4n/JL9izql8303mPqPdubuna/DWEMbmOzWYUWyCPhjhiEr2w3nQrjE7vZz1fBF+wzzP6dZbIcsgqACk53c9FGA=="
     },
     "@openzeppelin/gsn-helpers": {
       "version": "0.2.3",
@@ -5636,7 +5636,8 @@
           "version": "8.0.0",
           "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
           "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "escape-string-regexp": {
           "version": "2.0.0",
@@ -6157,6 +6158,7 @@
     },
     "scrypt-shim": {
       "version": "github:web3-js/scrypt-shim#be5e616323a8b5e568788bf94d03c1b8410eac54",
+      "from": "github:web3-js/scrypt-shim#be5e616323a8b5e568788bf94d03c1b8410eac54",
       "requires": {
         "scryptsy": "2.1.0",
         "semver": "6.3.0"
@@ -8205,6 +8207,7 @@
           "dependencies": {
             "websocket": {
               "version": "github:web3-js/WebSocket-Node#905deb4812572b344f5801f8c9ce8bb02799d82e",
+              "from": "github:web3-js/WebSocket-Node#905deb4812572b344f5801f8c9ce8bb02799d82e",
               "requires": {
                 "debug": "2.6.9",
                 "es5-ext": "0.10.53",
@@ -8775,6 +8778,7 @@
     },
     "websocket": {
       "version": "github:web3-js/WebSocket-Node#905deb4812572b344f5801f8c9ce8bb02799d82e",
+      "from": "github:web3-js/WebSocket-Node#905deb4812572b344f5801f8c9ce8bb02799d82e",
       "requires": {
         "debug": "2.6.9",
         "es5-ext": "0.10.53",
diff --git a/package.json b/package.json
index 81879d6..52d4ac0 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
   },
   "homepage": "https://github.com/quantstamp/stormx-token#readme",
   "dependencies": {
-    "@openzeppelin/contracts": "2.5.0",
+    "@openzeppelin/contracts": "4.7.2",
     "@openzeppelin/gsn-helpers": "0.2.3",
     "@openzeppelin/gsn-provider": "0.1.9",
     "coveralls": "3.0.0",