diff --git a/src/notifications/senders/AppleNotificationSender.ts b/src/notifications/senders/AppleNotificationSender.ts
index d64df98..8e5904a 100644
--- a/src/notifications/senders/AppleNotificationSender.ts
+++ b/src/notifications/senders/AppleNotificationSender.ts
@@ -17,6 +17,9 @@ export class AppleNotificationSender {
   private _lastRefreshedTimeMs: number | undefined = undefined;
 
   constructor(private shouldActuallySendNotifications = true) {
+    this.sendNotificationImmediately = this.sendNotificationImmediately.bind(this);
+    this.lastReloadedTimeForAPNsIsTooRecent = this.lastReloadedTimeForAPNsIsTooRecent.bind(this);
+    this.reloadAPNsTokenIfTimePassed = this.reloadAPNsTokenIfTimePassed.bind(this);
   }
 
   get lastRefreshedTimeMs(): number | undefined {