diff --git a/src/services/supporters.ts b/src/services/supporters.ts
index 2d867ff..bee563c 100644
--- a/src/services/supporters.ts
+++ b/src/services/supporters.ts
@@ -70,7 +70,7 @@ class SupportersService {
   private async subscribeToZapReceipts() {
     try {
       // Start with hardcoded relays for immediate cold start
-      let grimRelays = [...GRIMOIRE_ZAP_RELAYS];
+      const grimRelays = [...GRIMOIRE_ZAP_RELAYS];
 
       // Fetch relay list in background (non-blocking)
       // Don't await - let it happen in parallel with subscription