diff --git a/src/lib/container.ts b/src/lib/container.ts
index e1346b3..aa51b4e 100644
--- a/src/lib/container.ts
+++ b/src/lib/container.ts
@@ -1042,8 +1042,8 @@ export class Container<Env = unknown> extends DurableObject<Env> {
    * Executes any scheduled tasks that are due
    */
 
-  override async alarm(alarmProps: { isRetry: boolean; retryCount: number }): Promise<void> {
-    if (alarmProps.isRetry && alarmProps.retryCount > MAX_ALARM_RETRIES) {
+  override async alarm(alarmProps?: { isRetry: boolean; retryCount: number }): Promise<void> {
+    if (alarmProps?.isRetry && alarmProps?.retryCount > MAX_ALARM_RETRIES) {
       const scheduleCount =
         Number(this.sql`SELECT COUNT(*) as count FROM container_schedules`[0]?.count) || 0;
       const hasScheduledTasks = scheduleCount > 0;