diff --git a/package-lock.json b/package-lock.json
index 2647c86..3b5beec 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -639,6 +639,11 @@
         "@types/web3": "1.0.19"
       }
     },
+    "@openzeppelin/contracts": {
+      "version": "3.3.0",
+      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-3.3.0.tgz",
+      "integrity": "sha512-AemZEsQYtUp1WRkcmZm1div5ORfTpLquLaziCIrSagjxyKdmObxuaY1yjQ5SHFMctR8rLwp706NXTbiIRJg7pw=="
+    },
     "@resolver-engine/core": {
       "version": "0.3.3",
       "resolved": "https://registry.npmjs.org/@resolver-engine/core/-/core-0.3.3.tgz",
diff --git a/package.json b/package.json
index 30062d3..93a3ceb 100644
--- a/package.json
+++ b/package.json
@@ -7,5 +7,8 @@
     "ethereum-waffle": "^3.2.2",
     "ethers": "^5.0.26",
     "hardhat": "^2.0.8"
+  },
+  "dependencies": {
+    "@openzeppelin/contracts": "^3.3.0"
   }
 }