diff --git a/src/main/java/com/official/memento/todo/service/ToDoSchedulerService.java b/src/main/java/com/official/memento/todo/service/ToDoSchedulerService.java
index 008b8a5..1ce2134 100644
--- a/src/main/java/com/official/memento/todo/service/ToDoSchedulerService.java
+++ b/src/main/java/com/official/memento/todo/service/ToDoSchedulerService.java
@@ -26,6 +26,9 @@ public void updateIncompleteTodos() {
         LocalDateTime now = LocalDateTime.now(ZoneOffset.UTC);
 
         for (MemberPersonalInfo memberPersonalInfo : members){
+            if(memberPersonalInfo.getTimeZoneOffset() == null) {
+                continue;
+            }
             LocalDateTime memberLocalTime = now.plusSeconds(
                     ZoneOffset.of(memberPersonalInfo.getTimeZoneOffset()).getTotalSeconds()
             );