diff --git a/package.json b/package.json
old mode 100755
new mode 100644
index 88a2c08a..3d1d7e26
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "@nomiclabs/hardhat-ethers": "2.2.2",
     "@nomiclabs/hardhat-etherscan": "3.1.3",
     "@nomiclabs/hardhat-waffle": "2.0.3",
-    "@openzeppelin/contracts": "4.7.3",
+    "@openzeppelin/contracts": "4.9.3",
     "@openzeppelin/contracts-upgradeable": "4.7.3",
     "@superfluid-finance/ethereum-contracts": "1.5.0",
     "@superfluid-finance/sdk-core": "0.6.1",
diff --git a/yarn.lock b/yarn.lock
old mode 100755
new mode 100644
index 7d2654bd..814c1e06
--- a/yarn.lock
+++ b/yarn.lock
@@ -902,16 +902,16 @@
   resolved "https://registry.yarnpkg.com/@openzeppelin/contracts-upgradeable/-/contracts-upgradeable-4.7.3.tgz#f1d606e2827d409053f3e908ba4eb8adb1dd6995"
   integrity sha512-+wuegAMaLcZnLCJIvrVUDzA9z/Wp93f0Dla/4jJvIhijRrPabjQbZe6fWiECLaJyfn5ci9fqf9vTw3xpQOad2A==
 
-"@openzeppelin/contracts@4.7.3":
-  version "4.7.3"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.7.3.tgz#939534757a81f8d69cc854c7692805684ff3111e"
-  integrity sha512-dGRS0agJzu8ybo44pCIf3xBaPQN/65AIXNgK8+4gzKd5kbvlqyxryUYVLJv7fK98Seyd2hDZzVEHSWAh0Bt1Yw==
-
 "@openzeppelin/contracts@4.8.0":
   version "4.8.0"
   resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.8.0.tgz#6854c37df205dd2c056bdfa1b853f5d732109109"
   integrity sha512-AGuwhRRL+NaKx73WKRNzeCxOCOCxpaqF+kp8TJ89QzAipSwZy/NoflkWaL9bywXFRhIzXt8j38sfF7KBKCPWLw==
 
+"@openzeppelin/contracts@4.9.3":
+  version "4.9.3"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.9.3.tgz#00d7a8cf35a475b160b3f0293a6403c511099364"
+  integrity sha512-He3LieZ1pP2TNt5JbkPA4PNT9WC3gOTOlDcFGJW4Le4QKqwmiNJCRt44APfxMxvq7OugU/cqYuPcSBzOw38DAg==
+
 "@resolver-engine/core@^0.3.3":
   version "0.3.3"
   resolved "https://registry.yarnpkg.com/@resolver-engine/core/-/core-0.3.3.tgz#590f77d85d45bc7ecc4e06c654f41345db6ca967"