diff --git a/DEX/package.json b/DEX/package.json
index f63a36c..34aa2d2 100644
--- a/DEX/package.json
+++ b/DEX/package.json
@@ -24,7 +24,7 @@
     "@acala-network/eth-providers": "^2.5.9",
     "@nomiclabs/hardhat-ethers": "^2.0.2",
     "@nomiclabs/hardhat-waffle": "^2.0.1",
-    "@openzeppelin/contracts": "^4.4.2",
+    "@openzeppelin/contracts": "^4.8.2",
     "@polkadot/api": "8.1.1",
     "chai": "^4.3.4",
     "ethereum-waffle": "^3.4.0",
diff --git a/DEX/yarn.lock b/DEX/yarn.lock
index 1938142..0341851 100644
--- a/DEX/yarn.lock
+++ b/DEX/yarn.lock
@@ -1151,10 +1151,10 @@
   dependencies:
     "@open-web3/orml-type-definitions" "1.1.4"
 
-"@openzeppelin/contracts@^4.4.2":
-  version "4.8.0"
-  resolved "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.8.0.tgz#6854c37df205dd2c056bdfa1b853f5d732109109"
-  integrity sha512-AGuwhRRL+NaKx73WKRNzeCxOCOCxpaqF+kp8TJ89QzAipSwZy/NoflkWaL9bywXFRhIzXt8j38sfF7KBKCPWLw==
+"@openzeppelin/contracts@^4.8.2":
+  version "4.8.2"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.8.2.tgz#d815ade0027b50beb9bcca67143c6bcc3e3923d6"
+  integrity sha512-kEUOgPQszC0fSYWpbh2kT94ltOJwj1qfT2DWo+zVttmGmf97JZ99LspePNaeeaLhCImaHVeBbjaQFZQn7+Zc5g==
 
 "@polkadot/api-augment@8.1.1":
   version "8.1.1"