diff --git a/src/hooks/use-network-config.ts b/src/hooks/use-network-config.ts
index 8e54587..3856e39 100644
--- a/src/hooks/use-network-config.ts
+++ b/src/hooks/use-network-config.ts
@@ -1,8 +1,14 @@
 import { useAccount } from "wagmi";
 
-import { type NetworkConfig, getNetworkConfigByChainId } from "@/lib/config";
+import { type NetworkConfig, getNetworkConfigByChainId, NETWORK_CONFIGS } from "@/lib/config";
+import { safeLocalStorage } from "@/lib/utils";
 
 export const useNetworkConfig = (): NetworkConfig => {
   const { chainId } = useAccount();
+  const overrideChainId = safeLocalStorage("overrideChainId");
+  if (overrideChainId) {
+    const mainnet = NETWORK_CONFIGS.find(c => c.chainId === 1) ?? NETWORK_CONFIGS[0];
+    return { ...mainnet, chainId: Number(overrideChainId) };
+  }
   return getNetworkConfigByChainId(chainId);
 };
diff --git a/src/lib/wagmi.ts b/src/lib/wagmi.ts
index 87f8c88..e9d189b 100644
--- a/src/lib/wagmi.ts
+++ b/src/lib/wagmi.ts
@@ -74,15 +74,19 @@ const viemChainsByChainId: Record<number, Chain> = {
   560048: hoodi
 };
 
+const overrideChainId = safeLocalStorage("overrideChainId");
+
 // Dynamically generate chains from NETWORK_CONFIGS, using viem's configs as base
 const chainsArray = NETWORK_CONFIGS.map(config => {
-  const rpcUrl = safeLocalStorage(`customRpcUrl_${config.chainId}`) ?? config.rpcUrl;
+  const chainId = config.chainId === 1 && overrideChainId ? Number(overrideChainId) : config.chainId;
+  const rpcUrl = safeLocalStorage(`customRpcUrl_${chainId}`) ?? config.rpcUrl;
   const baseChain = viemChainsByChainId[config.chainId];
 
   if (baseChain) {
     // Use viem's chain config and override only what's needed
     return defineChain({
       ...baseChain,
+      id: chainId,
       iconBackground: "none",
       iconUrl: "/figma/ethereum_0-2171.svg",
       rpcUrls: {