diff --git a/app/install/EnableNotifications.tsx b/app/install/EnableNotifications.tsx
index cf9b4e8..6e6800c 100644
--- a/app/install/EnableNotifications.tsx
+++ b/app/install/EnableNotifications.tsx
@@ -40,7 +40,7 @@ function EnableButton({ onSubscribe }: { onSubscribe: () => void }) {
         try {
           navigator.serviceWorker.controller?.postMessage({
             type: "subscribed",
-            subscription,
+            subscription: subscription.toJSON(),
           })
           onSubscribe()
         } catch (error) {