diff --git a/scripts/deploymentUtils.ts b/scripts/deploymentUtils.ts
index cb8f9c4c..f633c658 100644
--- a/scripts/deploymentUtils.ts
+++ b/scripts/deploymentUtils.ts
@@ -228,6 +228,7 @@ export async function deployAllContracts(
   )
   const rollupUser = await deployContract('RollupUserLogic', signer, [], verify)
   const upgradeExecutor = await deployUpgradeExecutor(signer)
+  await upgradeExecutor.deployTransaction.wait()
   const validatorUtils = await deployContract(
     'ValidatorUtils',
     signer,
diff --git a/src/precompiles/ArbSys.sol b/src/precompiles/ArbSys.sol
index 4e7a8f41..56c0bad9 100644
--- a/src/precompiles/ArbSys.sol
+++ b/src/precompiles/ArbSys.sol
@@ -29,7 +29,8 @@ interface ArbSys {
     function arbChainID() external view returns (uint256);
 
     /**
-     * @notice Get internal version number identifying an ArbOS build
+     * @notice Get internal version number identifying an ArbOS build, this is `55 + nitroArbOS version number`
+     *         e.g. on ArbOS 31 this would return 86. This is the only function that have the 55 offset.
      * @return version number as int
      */
     function arbOSVersion() external view returns (uint256);