diff --git a/foundry.toml b/foundry.toml
index d436248..c8f0581 100644
--- a/foundry.toml
+++ b/foundry.toml
@@ -17,9 +17,13 @@ goerli = "https://rpc.ankr.com/eth_goerli"
 sepolia = "https://rpc.ankr.com/eth_sepolia"
 pangolin = "https://pangolin-rpc.darwinia.network"
 crab = "https://crab-rpc.darwinia.network"
+darwinia = "https://rpc.darwinia.network"
+arbitrum = "https://arb1.arbitrum.io/rpc"
 
 [etherscan]
+arbitrum = { key = "${ETHERSCAN_ARBITRUM_KEY}" }
 arbitrum-goerli = { key = "${ETHERSCAN_ARBITRUM_KEY}" }
 arbitrum-sepolia = { key = "${ETHERSCAN_ARBITRUM_KEY}" }
+darwinia = { key = "${ETHERSCAN_DARWINIA_KEY}", url = "https://darwinia.api.subscan.io/api/scan/evm/contract/verifysource" }
 pangolin = { key = "${ETHERSCAN_DARWINIA_KEY}", url = "https://pangolin.api.subscan.io/api/scan/evm/contract/verifysource" }
 crab = { key = "${ETHERSCAN_DARWINIA_KEY}", url = "https://crab.api.subscan.io/api/scan/evm/contract/verifysource" }