diff --git a/src/main/kotlin/io/emeraldpay/dshackle/Global.kt b/src/main/kotlin/io/emeraldpay/dshackle/Global.kt
index b9dd407b..88512d50 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/Global.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/Global.kt
@@ -68,7 +68,7 @@ class Global {
             "sepolia" to Chain.TESTNET_SEPOLIA,
             "sepolia-testnet" to Chain.TESTNET_SEPOLIA,
             "optimism-testnet" to Chain.TESTNET_OPTIMISM,
-            "optimism-arbitrum" to Chain.TESTNET_OPTIMISM,
+            "arbitrum-testnet" to Chain.TESTNET_ARBITRUM,
         )
 
         fun chainById(id: String?): Chain {