diff --git a/package-lock.json b/package-lock.json
index 74874512..ca4de157 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,7 @@
       "hasInstallScript": true,
       "license": "Apache-2.0",
       "dependencies": {
-        "@openzeppelin/contracts": "^4.8.3",
+        "@openzeppelin/contracts": "^4.9.1",
         "solidity-bytes-utils": "0.8.0",
         "solidity-mpt": "^0.1.0",
         "solidity-rlp": "^2.0.8",
@@ -1320,9 +1320,9 @@
       ]
     },
     "node_modules/@openzeppelin/contracts": {
-      "version": "4.8.3",
-      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.8.3.tgz",
-      "integrity": "sha512-bQHV8R9Me8IaJoJ2vPG4rXcL7seB7YVuskr4f+f5RyOStSZetwzkWtoqDMl5erkBJy0lDRUnIR2WIkPiC0GJlg=="
+      "version": "4.9.1",
+      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.9.1.tgz",
+      "integrity": "sha512-aLDTLu/If1qYIFW5g4ZibuQaUsFGWQPBq1mZKp/txaebUnGHDmmiBhRLY1tDNedN0m+fJtKZ1zAODS9Yk+V6uA=="
     },
     "node_modules/@protobufjs/aspromise": {
       "version": "1.1.2",
@@ -11716,9 +11716,9 @@
       "integrity": "sha512-T04e4iTurVy7I8Sw4+c5OSN9/RkPlo1uKxAomtxQNLq8j1uPAqnsqG1bqvY3Jv7c13gyr6dui0zmh/I3+f/JaQ=="
     },
     "@openzeppelin/contracts": {
-      "version": "4.8.3",
-      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.8.3.tgz",
-      "integrity": "sha512-bQHV8R9Me8IaJoJ2vPG4rXcL7seB7YVuskr4f+f5RyOStSZetwzkWtoqDMl5erkBJy0lDRUnIR2WIkPiC0GJlg=="
+      "version": "4.9.1",
+      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.9.1.tgz",
+      "integrity": "sha512-aLDTLu/If1qYIFW5g4ZibuQaUsFGWQPBq1mZKp/txaebUnGHDmmiBhRLY1tDNedN0m+fJtKZ1zAODS9Yk+V6uA=="
     },
     "@protobufjs/aspromise": {
       "version": "1.1.2",
diff --git a/package.json b/package.json
index 2c99804f..08cbee3d 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
     "postinstall": "npm run compile"
   },
   "dependencies": {
-    "@openzeppelin/contracts": "^4.8.3",
+    "@openzeppelin/contracts": "^4.9.1",
     "solidity-bytes-utils": "0.8.0",
     "solidity-rlp": "^2.0.8",
     "solidity-stringutils": "git+https://github.com/ibc-solidity/solidity-stringutils.git#716294569dd2304ae8d81681951733542f999015",