diff --git a/src/config.ts b/src/config.ts
index 24055a36a..aa7748c1d 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -35,6 +35,10 @@ export class Config {
     signer: ethers.Signer & TypedDataSigner | null,
   ) {
     let cfg = (<Record<string, any>> config)[network.name];
+    
+    if (!cfg) {
+      throw `Network ${network.name} is not supported`;
+    }
 
     this.network = network;
     this.registrar = cfg.registrar;
diff --git a/src/session.ts b/src/session.ts
index aa203722e..ac01bfa6c 100644
--- a/src/session.ts
+++ b/src/session.ts
@@ -164,6 +164,8 @@ export const session = derived(state, s => {
   return null;
 });
 
+window.ethereum?.on('chainChanged', () => location.reload());
+
 // Updates state when user changes accounts
 window.ethereum?.on("accountsChanged", state.setChangedAccount);