diff --git a/contracts/interfaces/IBasePolygonZkEVMGlobalExitRoot.sol b/contracts/interfaces/IBasePolygonZkEVMGlobalExitRoot.sol
index 5d765ccf..f1b0a1b1 100644
--- a/contracts/interfaces/IBasePolygonZkEVMGlobalExitRoot.sol
+++ b/contracts/interfaces/IBasePolygonZkEVMGlobalExitRoot.sol
@@ -11,7 +11,7 @@ interface IBasePolygonZkEVMGlobalExitRoot {
     /**
      * @dev Thrown when the caller is not the trusted sequencer
      */
-    error OnlyTrustedSequencer();
+    error OnlyCoinbase();
 
     function updateExitRoot(bytes32 newRollupExitRoot) external;
 
diff --git a/contracts/v2/PolygonZkEVMGlobalExitRootV2.sol b/contracts/v2/PolygonZkEVMGlobalExitRootV2.sol
index c904686b..820d0184 100644
--- a/contracts/v2/PolygonZkEVMGlobalExitRootV2.sol
+++ b/contracts/v2/PolygonZkEVMGlobalExitRootV2.sol
@@ -25,6 +25,12 @@ contract PolygonZkEVMGlobalExitRootV2 is
     // Store every l1InfoLeaf
     mapping(uint32 leafCount => bytes32 l1InfoRoot) public l1InfoRootMap;
 
+    /**
+     * @dev This empty reserved space is put in place to allow future versions to add new
+     * variables without shifting down storage in the inheritance chain.
+     */
+    uint256[50] private _gap;
+
     /**
      * @dev Emitted when the global exit root is updated
      */
@@ -77,7 +83,7 @@ contract PolygonZkEVMGlobalExitRootV2 is
      * @notice Update the exit root of one of the networks and the global exit root
      * @param newRoot new exit tree root
      */
-    function updateExitRoot(bytes32 newRoot) external {
+    function updateExitRoot(bytes32 newRoot) external virtual {
         // Store storage variables into temporal variables since will be used multiple times
         bytes32 cacheLastRollupExitRoot;
         bytes32 cacheLastMainnetExitRoot;
diff --git a/contracts/v2/sovereignChains/GlobalExitRootManagerL2SovereignChain.sol b/contracts/v2/sovereignChains/GlobalExitRootManagerL2SovereignChain.sol
index f798c75c..b53e905c 100644
--- a/contracts/v2/sovereignChains/GlobalExitRootManagerL2SovereignChain.sol
+++ b/contracts/v2/sovereignChains/GlobalExitRootManagerL2SovereignChain.sol
@@ -3,42 +3,23 @@
 pragma solidity 0.8.20;
 import "../../interfaces/IBasePolygonZkEVMGlobalExitRoot.sol";
 import {PolygonAccessControlUpgradeable} from "../lib/PolygonAccessControlUpgradeable.sol";
+import "../PolygonZkEVMGlobalExitRootV2.sol";
 
 /**
  * Contract responsible for managing the exit roots for the Sovereign chains and global exit roots
  */
-contract GlobalExitRootManagerL2SovereignChain is
-    PolygonAccessControlUpgradeable,
-    IBasePolygonZkEVMGlobalExitRoot
-{
-    // Store every global exit root: Root --> timestamp
-    mapping(bytes32 => uint256) public globalExitRootMap;
-
-    // Rollup exit root will be updated for every Sovereign chain call
-    bytes32 public lastRollupExitRoot;
-
-    // Sovereign chain Bridge address
-    address public immutable bridgeAddress;
-
+contract GlobalExitRootManagerL2SovereignChain is PolygonZkEVMGlobalExitRootV2 {
     /**
      * @dev Emitted when a new global exit root is inserted
      */
     event InsertGlobalExitRoot(bytes32 indexed newGlobalExitRoot);
 
-    /**
-     * @param _bridgeAddress BridgeL2SovereignChain contract address
-     */
-    constructor(address _bridgeAddress) {
-        bridgeAddress = _bridgeAddress;
-        _disableInitializers();
-    }
-
     /**
      * @notice Only allows a function to be callable if its called by coinbase (trusted sequencer in sovereign chains)
      */
-    modifier onlyTrustedSequencer() {
+    modifier onlyCoinbase() {
         if (block.coinbase != msg.sender) {
-            revert OnlyTrustedSequencer();
+            revert OnlyCoinbase();
         }
         _;
     }
@@ -53,17 +34,31 @@ contract GlobalExitRootManagerL2SovereignChain is
         _;
     }
 
+    /**
+     * @param _bridgeAddress PolygonZkEVMBridge contract address
+     */
+    constructor(
+        address _rollupManager,
+        address _bridgeAddress
+    ) PolygonZkEVMGlobalExitRootV2(_rollupManager, _bridgeAddress) {}
+
     /**
      * @notice Update the exit root of one of the networks and the global exit root
      * @param newRoot new exit tree root
      */
-    function updateExitRoot(bytes32 newRoot) external onlyBridgeAddress() {
+    function updateExitRoot(
+        bytes32 newRoot
+    ) external override onlyBridgeAddress {
         lastRollupExitRoot = newRoot;
     }
 
+    /**
+     * @notice Insert a new global exit root
+     * @param _newRoot new global exit root
+     */
     function insertGlobalExitRoot(
         bytes32 _newRoot
-    ) external onlyTrustedSequencer {
+    ) external onlyCoinbase {
         // do not update timestamp if already set
         if (globalExitRootMap[_newRoot] == 0) {
             globalExitRootMap[_newRoot] = block.timestamp;
diff --git a/test/contractsv2/BridgeL2SovereignChain.test.ts b/test/contractsv2/BridgeL2SovereignChain.test.ts
index 440a57d9..a2370eec 100644
--- a/test/contractsv2/BridgeL2SovereignChain.test.ts
+++ b/test/contractsv2/BridgeL2SovereignChain.test.ts
@@ -71,6 +71,7 @@ describe("BridgeL2SovereignChain Contract", () => {
             "GlobalExitRootManagerL2SovereignChain"
         );
         sovereignChainGlobalExitRoot = await PolygonZkEVMGlobalExitRootFactory.deploy(
+            rollupManager.address,
             sovereignChainBridgeContract.target
         );