diff --git a/src/api/subscriptions.ts b/src/api/subscriptions.ts
index ff14dbc..3904ca8 100644
--- a/src/api/subscriptions.ts
+++ b/src/api/subscriptions.ts
@@ -231,7 +231,7 @@ export async function cancelSubscription(
 export interface Subscription {
   id: number,
   sender: Profile,
-  sender_address: string,
+  sender_address: string | null,
   expires_at: string,
 }
 
diff --git a/src/components/SubscriptionSetup.vue b/src/components/SubscriptionSetup.vue
index 9b65a80..d9d750f 100644
--- a/src/components/SubscriptionSetup.vue
+++ b/src/components/SubscriptionSetup.vue
@@ -250,8 +250,10 @@ function isSubscriptionActive(subscription: Subscription): boolean {
 }
 
 function onSubscriberSelected(subscription: Subscription) {
-  subscriberAddress = subscription.sender_address
-  subscriptionState = null
+  if (subscription.sender_address !== null) {
+    subscriberAddress = subscription.sender_address
+    subscriptionState = null
+  }
 }
 
 async function onCheckSubsciptionState() {