diff --git a/cross-chain/arbitrum/deploy_l2/12_update_wormhole_gateway_mapping.ts b/cross-chain/arbitrum/deploy_l2/12_update_wormhole_gateway_mapping.ts
index c5401d158..5f4f22c24 100644
--- a/cross-chain/arbitrum/deploy_l2/12_update_wormhole_gateway_mapping.ts
+++ b/cross-chain/arbitrum/deploy_l2/12_update_wormhole_gateway_mapping.ts
@@ -6,11 +6,11 @@ const func: DeployFunction = async function (hre: HardhatRuntimeEnvironment) {
   const { execute } = deployments
   const { deployer } = await getNamedAccounts()
 
-  // See https://book.wormhole.com/reference/contracts.html
-  // This ID is valid for both Arbitrum Goerli and Mainnet
-  // TODO: check if id is correct for Arbitrum Sepolia as well (once Wormhole
-  // supports that testnet)
-  const wormholeChainID = 23
+  // See https://docs.wormhole.com/wormhole/blockchain-environments/evm#arbitrum
+  // and https://docs.wormhole.com/wormhole/blockchain-environments/evm#arbitrum-sepolia
+  // The value `23` is valid for both Arbitrum Goerli and Arbitrum Mainnet. The
+  // value for Arbitrum Sepolia is `10003`.
+  const wormholeChainID = hre.network.name === "sepolia" ? 10003 : 23
 
   const ArbitrumWormholeGateway = await deployments.get(
     "ArbitrumWormholeGateway"
diff --git a/cross-chain/arbitrum/deploy_l2/13_update_with_optimism_in_wormhole_gateway_mapping.ts b/cross-chain/arbitrum/deploy_l2/13_update_with_optimism_in_wormhole_gateway_mapping.ts
index 54d523689..451931949 100644
--- a/cross-chain/arbitrum/deploy_l2/13_update_with_optimism_in_wormhole_gateway_mapping.ts
+++ b/cross-chain/arbitrum/deploy_l2/13_update_with_optimism_in_wormhole_gateway_mapping.ts
@@ -10,11 +10,11 @@ const func: DeployFunction = async function (hre: HardhatRuntimeEnvironment) {
   const fakeOptimismWormholeGateway =
     "0x1af5DC16568EFF2d480a43A77E6C409e497FcFb9"
 
-  // See https://book.wormhole.com/reference/contracts.html
-  // This ID is valid for both Optimism Goerli and Mainnet
-  // TODO: check if id is correct for Optimism Sepolia as well (once Wormhole
-  // supports that testnet)
-  const optimismWormholeChainID = 24
+  // See https://docs.wormhole.com/wormhole/blockchain-environments/evm#optimism
+  // and https://docs.wormhole.com/wormhole/blockchain-environments/evm#optimism-sepolia
+  // The value `24` is valid for both Optimism Goerli and Optimism Mainnet. The
+  // value for Optimism Sepolia is `10005`.
+  const optimismWormholeChainID = hre.network.name === "sepolia" ? 10005 : 24
 
   const optimismWormholeGateway = await deployments.getOrNull(
     "OptimismWormholeGateway"
diff --git a/cross-chain/arbitrum/deploy_l2/14_update_with_polygon_in_wormhole_gateway_mapping.ts b/cross-chain/arbitrum/deploy_l2/14_update_with_polygon_in_wormhole_gateway_mapping.ts
index 8197708ce..b9e38ad77 100644
--- a/cross-chain/arbitrum/deploy_l2/14_update_with_polygon_in_wormhole_gateway_mapping.ts
+++ b/cross-chain/arbitrum/deploy_l2/14_update_with_polygon_in_wormhole_gateway_mapping.ts
@@ -10,10 +10,9 @@ const func: DeployFunction = async function (hre: HardhatRuntimeEnvironment) {
   const fakePolygonWormholeGateway =
     "0x1af5DC16568EFF2d480a43A77E6C409e497FcFb9"
 
-  // See https://book.wormhole.com/reference/contracts.html
-  // This ID is valid for both Polygon Testnet (Mumbai) and Mainnet
-  // TODO: check ID for the new L2 Polygon testnet once it's annunced and
-  // supported by Wormhole
+  // This ID is valid for both Polygonn Goerli-based Testnet (Mumbai) and
+  // Mainnet. Wormhole does not support the Sepolia-based Amoy Testnet yet.
+  // TODO: Update the ID once the support is added.
   const polygonWormholeChainID = 5
 
   const polygonWormholeGateway = await deployments.getOrNull(
diff --git a/cross-chain/arbitrum/deploy_l2/15_update_with_base_in_wormhole_gateway_mapping.ts b/cross-chain/arbitrum/deploy_l2/15_update_with_base_in_wormhole_gateway_mapping.ts
index 02d693c55..ef15f1557 100644
--- a/cross-chain/arbitrum/deploy_l2/15_update_with_base_in_wormhole_gateway_mapping.ts
+++ b/cross-chain/arbitrum/deploy_l2/15_update_with_base_in_wormhole_gateway_mapping.ts
@@ -9,11 +9,11 @@ const func: DeployFunction = async function (hre: HardhatRuntimeEnvironment) {
   // Fake BaseWormholeGateway for local development purposes only.
   const fakeBaseWormholeGateway = "0x1af5DC16568EFF2d480a43A77E6C409e497FcFb9"
 
-  // See https://docs.wormhole.com/wormhole/blockchain-environments/evm#base
-  // This ID is valid for both Base Testnet and Mainnet
-  // TODO: check if id is correct for Base Sepolia as well (once Wormhole
-  // supports that testnet)
-  const baseWormholeChainID = 30
+  // See https://docs.wormhole.com/wormhole/blockchain-environments/evm#base and
+  // https://docs.wormhole.com/wormhole/blockchain-environments/evm#base-sepolia
+  // The value `30` is valid for both Base Goerli and Base Mainnet. The value
+  // for Base Sepolia is `10004`.
+  const baseWormholeChainID = hre.network.name === "sepolia" ? 10004 : 30
 
   const baseWormholeGateway = await deployments.getOrNull("BaseWormholeGateway")