diff --git a/damus/Util/LocalNotification.swift b/damus/Util/LocalNotification.swift
index c10ea21f..51827734 100644
--- a/damus/Util/LocalNotification.swift
+++ b/damus/Util/LocalNotification.swift
@@ -18,8 +18,11 @@ struct LossyLocalNotification {
         ]
     }
     
-    static func from_user_info(user_info: [AnyHashable: Any]) -> LossyLocalNotification {
-        let target_id = MentionRef.from_bech32(str: user_info["id"] as! String)!
+    static func from_user_info(user_info: [AnyHashable: Any]) -> LossyLocalNotification? {
+        guard let id = user_info["id"] as? String,
+              let target_id = MentionRef.from_bech32(str: id) else {
+            return nil
+        }
         let typestr = user_info["type"] as! String
         let type = LocalNotificationType(rawValue: typestr)!
         
diff --git a/damus/damusApp.swift b/damus/damusApp.swift
index a634f88f..08c53521 100644
--- a/damus/damusApp.swift
+++ b/damus/damusApp.swift
@@ -58,7 +58,9 @@ class AppDelegate: NSObject, UIApplicationDelegate, UNUserNotificationCenterDele
 
     func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
         let userInfo = response.notification.request.content.userInfo
-        let notification = LossyLocalNotification.from_user_info(user_info: userInfo)
+        guard let notification = LossyLocalNotification.from_user_info(user_info: userInfo) else {
+            return
+        }
         notify(.local_notification(notification))
         completionHandler()
     }