diff --git a/package-lock.json b/package-lock.json
index cbf82d9..36a772f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "ecobux",
-  "version": "0.0.0",
+  "version": "1.0.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -554,9 +554,9 @@
       }
     },
     "@openzeppelin/contracts": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-3.0.1.tgz",
-      "integrity": "sha512-uSrD7hZ0ViuHGqHZbeHawZBi/uy7aBiNramXAt2dFFuSuoU4u9insS3V3zdVfOnYSPreUo636xSOuQIFN4//HA==",
+      "version": "4.8.3",
+      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.8.3.tgz",
+      "integrity": "sha512-bQHV8R9Me8IaJoJ2vPG4rXcL7seB7YVuskr4f+f5RyOStSZetwzkWtoqDMl5erkBJy0lDRUnIR2WIkPiC0GJlg==",
       "dev": true
     },
     "@openzeppelin/contracts-ethereum-package": {
@@ -26727,7 +26727,7 @@
         },
         "websocket": {
           "version": "github:web3-js/WebSocket-Node#905deb4812572b344f5801f8c9ce8bb02799d82e",
-          "from": "github:web3-js/WebSocket-Node#905deb4812572b344f5801f8c9ce8bb02799d82e",
+          "from": "github:web3-js/WebSocket-Node#polyfill/globalThis",
           "requires": {
             "debug": "^2.2.0",
             "es5-ext": "^0.10.50",
@@ -27132,7 +27132,7 @@
         },
         "websocket": {
           "version": "github:web3-js/WebSocket-Node#905deb4812572b344f5801f8c9ce8bb02799d82e",
-          "from": "github:web3-js/WebSocket-Node#905deb4812572b344f5801f8c9ce8bb02799d82e",
+          "from": "github:web3-js/WebSocket-Node#polyfill/globalThis",
           "requires": {
             "debug": "^2.2.0",
             "es5-ext": "^0.10.50",
diff --git a/package.json b/package.json
index d23bbcb..a78120a 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
   },
   "devDependencies": {
     "@openzeppelin/cli": "^2.8.2",
-    "@openzeppelin/contracts": "^3.0.1",
+    "@openzeppelin/contracts": "^4.8.3",
     "@openzeppelin/contracts-ethereum-package": "^2.5.0",
     "@openzeppelin/gsn-helpers": "^0.2.3",
     "@openzeppelin/gsn-provider": "^0.1.10",