diff --git a/shared/constants/network.js b/shared/constants/network.js
index ce8fa7166..ba43e13de 100644
--- a/shared/constants/network.js
+++ b/shared/constants/network.js
@@ -23,7 +23,7 @@ export const KOVAN_CHAIN_ID = '0x2a';
 export const LOCALHOST_CHAIN_ID = '0x539';
 export const BSC_CHAIN_ID = '0x38';
 export const OPTIMISM_CHAIN_ID = '0xa';
-export const OPTIMISM_TESTNET_CHAIN_ID = '0x45';
+export const OPTIMISM_TESTNET_CHAIN_ID = '0x1a4';
 export const POLYGON_CHAIN_ID = '0x89';
 export const AVALANCHE_CHAIN_ID = '0xa86a';
 export const FANTOM_CHAIN_ID = '0xfa';