diff --git a/data/networks.ts b/data/networks.ts
index 6a8bfd9da..0368ebed5 100644
--- a/data/networks.ts
+++ b/data/networks.ts
@@ -13,10 +13,20 @@ export const l1Networks = {
     ...mainnet,
     name: "Ethereum",
     network: "mainnet",
+    rpcUrls: {
+      default: {
+        http: [`https://rpc.ankr.com/eth/${portalRuntimeConfig.ankrToken}`],
+      },
+    },
   },
   sepolia: {
     ...sepolia,
     name: "Ethereum Sepolia Testnet",
+    rpcUrls: {
+      default: {
+        http: [`https://rpc.ankr.com/eth_sepolia/${portalRuntimeConfig.ankrToken}`],
+      },
+    },
   },
 } as const;
 export type L1Network = Chain;