diff --git a/.changeset/flat-bottles-wonder.md b/.changeset/flat-bottles-wonder.md
index 099ea833983..f7ee7dd5db5 100644
--- a/.changeset/flat-bottles-wonder.md
+++ b/.changeset/flat-bottles-wonder.md
@@ -2,4 +2,6 @@
 'openzeppelin-solidity': minor
 ---
 
-Replace some uses of `abi.encodePacked` with clearer alternatives (e.g. `bytes.concat`, `string.concat`).
+Replace some uses of `abi.encodePacked` with clearer alternatives (e.g. `bytes.concat`, `string.concat`). (#4504)[https://github.com/OpenZeppelin/openzeppelin-contracts/pull/4504]
+
+pr: #4296
diff --git a/contracts/utils/cryptography/MessageHashUtils.sol b/contracts/utils/cryptography/MessageHashUtils.sol
index 1a1bea73105..3cf0ce9d93b 100644
--- a/contracts/utils/cryptography/MessageHashUtils.sol
+++ b/contracts/utils/cryptography/MessageHashUtils.sol
@@ -46,7 +46,8 @@ library MessageHashUtils {
      * See {ECDSA-recover}.
      */
     function toEthSignedMessageHash(bytes memory message) internal pure returns (bytes32 digest) {
-        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(message.length), message));
+        return
+            keccak256(bytes.concat("\x19Ethereum Signed Message:\n", bytes(Strings.toString(message.length)), message));
     }
 
     /**