diff --git a/lib/pick-chain-url.js b/lib/pick-chain-url.js
index 067dcc54..bf8d4a9a 100644
--- a/lib/pick-chain-url.js
+++ b/lib/pick-chain-url.js
@@ -5,7 +5,9 @@ const OTHER_API_URL_MAP = {
   rinkeby: 'https://api-rinkeby.etherscan.io',
   homestead: 'https://api.etherscan.io',
   arbitrum: 'https://api.arbiscan.io',
-  arbitrum_rinkeby: 'https://api-testnet.arbiscan.io'
+  arbitrum_rinkeby: 'https://api-testnet.arbiscan.io',
+  avalanche:'https://api.snowtrace.io',
+  avalanche_fuji: 'https://api-testnet.snowtrace.io',
 };
 
 /**