diff --git a/solidity/ecdsa/yarn.lock b/solidity/ecdsa/yarn.lock
index 4e95365aa5..8a9b861291 100644
--- a/solidity/ecdsa/yarn.lock
+++ b/solidity/ecdsa/yarn.lock
@@ -1144,9 +1144,9 @@
     "@types/web3" "1.0.19"
 
 "@openzeppelin/contracts-upgradeable@^4.6.0":
-  version "4.8.3"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts-upgradeable/-/contracts-upgradeable-4.8.3.tgz#6b076a7b751811b90fe3a172a7faeaa603e13a3f"
-  integrity sha512-SXDRl7HKpl2WDoJpn7CK/M9U4Z8gNXDHHChAKh0Iz+Wew3wu6CmFYBeie3je8V0GSXZAIYYwUktSrnW/kwVPtg==
+  version "4.9.1"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts-upgradeable/-/contracts-upgradeable-4.9.1.tgz#03e33b8059ce43884995e69e4479f5a7f084b404"
+  integrity sha512-UZf5/VdaBA/0kxF7/gg+2UrC8k+fbgiUM0Qw1apAhwpBWBxULbsHw0ZRMgT53nd6N8hr53XFjhcWNeTRGIiCVw==
 
 "@openzeppelin/contracts-upgradeable@~4.5.2":
   version "4.5.2"