diff --git a/package-lock.json b/package-lock.json
index c925342..a81c813 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "@soliditylabs/erc20-permit",
-  "version": "0.1.0",
+  "version": "1.0.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -841,9 +841,9 @@
       }
     },
     "@openzeppelin/contracts": {
-      "version": "3.2.1-solc-0.7",
-      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-3.2.1-solc-0.7.tgz",
-      "integrity": "sha512-VfKZE9L2HNaZVBR7l5yHbRmap3EiVw9F5iVXRRDdgfnA9vQ1yFanrs0VYmdo2VIXC+EsI9wPPYZY9Ic7/qDBdw==",
+      "version": "4.4.1",
+      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.4.1.tgz",
+      "integrity": "sha512-o+pHCf/yMLSlV5MkDQEzEQL402i6SoRnktru+0rdSxVEFZcTzzGhZCAtZjUFyKGazMSv1TilzMg+RbED1N8XHQ==",
       "dev": true
     },
     "@resolver-engine/core": {
diff --git a/package.json b/package.json
index 554e42e..e797507 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
     "@nomiclabs/buidler-ethers": "^2.0.0",
     "@nomiclabs/buidler-waffle": "^2.1.0",
     "@nomiclabs/buidler-web3": "^1.3.4",
-    "@openzeppelin/contracts": "^3.2.1-solc-0.7",
+    "@openzeppelin/contracts": "^4.4.1",
     "buidler-deploy": "^0.6.0-beta.16",
     "chai": "^4.2.0",
     "eth-permit": "^0.1.7",