diff --git a/l1-contracts/deploy-scripts/DeployL1.s.sol b/l1-contracts/deploy-scripts/DeployL1.s.sol
index 8c071090b..f4de831a8 100644
--- a/l1-contracts/deploy-scripts/DeployL1.s.sol
+++ b/l1-contracts/deploy-scripts/DeployL1.s.sol
@@ -586,12 +586,15 @@ contract DeployL1Script is Script {
 
         Bridgehub bridgehub = Bridgehub(addresses.bridgehub.bridgehubProxy);
         bridgehub.transferOwnership(addresses.governance);
+        bridgehub.setPendingAdmin(addresses.chainAdmin);
 
         L1SharedBridge sharedBridge = L1SharedBridge(addresses.bridges.sharedBridgeProxy);
         sharedBridge.transferOwnership(addresses.governance);
+        sharedBridge.setPendingAdmin(addresses.chainAdmin);
 
         StateTransitionManager stm = StateTransitionManager(addresses.stateTransition.stateTransitionProxy);
         stm.transferOwnership(addresses.governance);
+        stm.setPendingAdmin(addresses.chainAdmin);
 
         vm.stopBroadcast();
         console.log("Owners updated");
@@ -702,6 +705,7 @@ contract DeployL1Script is Script {
             addresses.blobVersionedHashRetriever
         );
         vm.serializeAddress("deployed_addresses", "validator_timelock_addr", addresses.validatorTimelock);
+        vm.serializeAddress("deployed_addresses", "chain_admin", addresses.chainAdmin);
         vm.serializeString("deployed_addresses", "bridgehub", bridgehub);
         vm.serializeString("deployed_addresses", "state_transition", stateTransition);
         string memory deployedAddresses = vm.serializeString("deployed_addresses", "bridges", bridges);
diff --git a/l1-contracts/deploy-scripts/RegisterHyperchain.s.sol b/l1-contracts/deploy-scripts/RegisterHyperchain.s.sol
index e7615b598..f5e23cf8d 100644
--- a/l1-contracts/deploy-scripts/RegisterHyperchain.s.sol
+++ b/l1-contracts/deploy-scripts/RegisterHyperchain.s.sol
@@ -7,8 +7,7 @@ import {Script, console2 as console} from "forge-std/Script.sol";
 import {Vm} from "forge-std/Vm.sol";
 import {stdToml} from "forge-std/StdToml.sol";
 
-import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
-import {IBridgehub} from "contracts/bridgehub/IBridgehub.sol";
+import {Bridgehub} from "contracts/bridgehub/Bridgehub.sol";
 import {IZkSyncHyperchain} from "contracts/state-transition/chain-interfaces/IZkSyncHyperchain.sol";
 import {ValidatorTimelock} from "contracts/state-transition/ValidatorTimelock.sol";
 import {Governance} from "contracts/governance/Governance.sol";
@@ -118,20 +117,17 @@ contract RegisterHyperchainScript is Script {
     }
 
     function registerTokenOnBridgehub() internal {
-        IBridgehub bridgehub = IBridgehub(config.bridgehub);
-        Ownable ownable = Ownable(config.bridgehub);
+        Bridgehub bridgehub = Bridgehub(config.bridgehub);
 
         if (bridgehub.tokenIsRegistered(config.baseToken)) {
             console.log("Token already registered on Bridgehub");
         } else {
             bytes memory data = abi.encodeCall(bridgehub.addToken, (config.baseToken));
-            Utils.executeUpgrade({
-                _governor: ownable.owner(),
-                _salt: bytes32(config.bridgehubCreateNewChainSalt),
+            Utils.chainAdminMulticall({
+                _chainAdmin: bridgehub.admin(),
                 _target: config.bridgehub,
                 _data: data,
-                _value: 0,
-                _delay: 0
+                _value: 0
             });
             console.log("Token registered on Bridgehub");
         }
@@ -156,8 +152,7 @@ contract RegisterHyperchainScript is Script {
     }
 
     function registerHyperchain() internal {
-        IBridgehub bridgehub = IBridgehub(config.bridgehub);
-        Ownable ownable = Ownable(config.bridgehub);
+        Bridgehub bridgehub = Bridgehub(config.bridgehub);
 
         vm.recordLogs();
         bytes memory data = abi.encodeCall(
@@ -172,14 +167,7 @@ contract RegisterHyperchainScript is Script {
             )
         );
 
-        Utils.executeUpgrade({
-            _governor: ownable.owner(),
-            _salt: bytes32(config.bridgehubCreateNewChainSalt),
-            _target: config.bridgehub,
-            _data: data,
-            _value: 0,
-            _delay: 0
-        });
+        Utils.chainAdminMulticall({_chainAdmin: bridgehub.admin(), _target: config.bridgehub, _data: data, _value: 0});
         console.log("Hyperchain registered");
 
         // Get new diamond proxy address from emitted events
diff --git a/l1-contracts/deploy-scripts/Utils.sol b/l1-contracts/deploy-scripts/Utils.sol
index 23bcf0ff8..fb56bce08 100644
--- a/l1-contracts/deploy-scripts/Utils.sol
+++ b/l1-contracts/deploy-scripts/Utils.sol
@@ -10,6 +10,7 @@ import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 import {REQUIRED_L2_GAS_PRICE_PER_PUBDATA} from "contracts/common/Config.sol";
 import {L2_DEPLOYER_SYSTEM_CONTRACT_ADDR} from "contracts/common/L2ContractAddresses.sol";
 import {L2ContractHelper} from "contracts/common/libraries/L2ContractHelper.sol";
+import {IChainAdmin} from "contracts/governance/IChainAdmin.sol";
 
 library Utils {
     // Cheatcodes address, 0x7109709ECfa91a80626fF3989D68f67F5b1DD12D.
@@ -288,6 +289,15 @@ library Utils {
         return bytecode;
     }
 
+    function chainAdminMulticall(address _chainAdmin, address _target, bytes memory _data, uint256 _value) internal {
+        IChainAdmin chainAdmin = IChainAdmin(_chainAdmin);
+
+        IChainAdmin.Call[] memory calls = new IChainAdmin.Call[](1);
+        calls[0] = IChainAdmin.Call({target: _target, value: _value, data: _data});
+        vm.broadcast();
+        chainAdmin.multicall(calls, true);
+    }
+
     function executeUpgrade(
         address _governor,
         bytes32 _salt,