diff --git a/protocol-contracts/staking/contracts/OperatorRewarder.sol b/protocol-contracts/staking/contracts/OperatorRewarder.sol
index 7fc9d1df19..56865b8858 100644
--- a/protocol-contracts/staking/contracts/OperatorRewarder.sol
+++ b/protocol-contracts/staking/contracts/OperatorRewarder.sol
@@ -36,19 +36,19 @@ contract OperatorRewarder {
     mapping(address => address) private _authorizedClaimers;
 
     /// @notice Emitted when the beneficiary is transferred.
-    event BeneficiaryTransferred(address oldBeneficiary, address newBeneficiary);
+    event BeneficiaryTransferred(address indexed oldBeneficiary, address indexed newBeneficiary);
 
     /// @notice Emitted when the contract is shut down.
     event Shutdown();
 
     /// @notice Emitted when the maximum fee is updated.
-    event MaxFeeUpdated(uint16 oldFee, uint16 newFee);
+    event MaxFeeUpdated(uint16 indexed oldFee, uint16 indexed newFee);
 
     /// @notice Emitted when the fee is updated.
-    event FeeUpdated(uint16 oldFee, uint16 newFee);
+    event FeeUpdated(uint16 indexed oldFee, uint16 indexed newFee);
 
     /// @notice Emitted when an address is authorized to claim rewards on behalf of the receiver address.
-    event ClaimerAuthorized(address receiver, address claimer);
+    event ClaimerAuthorized(address indexed receiver, address indexed claimer);
 
     /// @notice Error for invalid claimer address.
     error InvalidClaimer(address claimer);
diff --git a/protocol-contracts/staking/contracts/OperatorStaking.sol b/protocol-contracts/staking/contracts/OperatorStaking.sol
index 2f047261d3..62aed3ba27 100644
--- a/protocol-contracts/staking/contracts/OperatorStaking.sol
+++ b/protocol-contracts/staking/contracts/OperatorStaking.sol
@@ -61,7 +61,7 @@ contract OperatorStaking is ERC1363Upgradeable, ReentrancyGuardTransient, UUPSUp
     );
 
     /// @dev Emitted when the rewarder contract is set.
-    event RewarderSet(address oldRewarder, address newRewarder);
+    event RewarderSet(address indexed oldRewarder, address indexed newRewarder);
 
     /// @dev Thrown when the caller is not the ProtocolStaking's owner.
     error CallerNotProtocolStakingOwner(address caller);