diff --git a/favor/src/main/java/com/favor/favor/reminder/ReminderService.java b/favor/src/main/java/com/favor/favor/reminder/ReminderService.java
index a08dfd6..15f2b9a 100644
--- a/favor/src/main/java/com/favor/favor/reminder/ReminderService.java
+++ b/favor/src/main/java/com/favor/favor/reminder/ReminderService.java
@@ -71,7 +71,7 @@ public void updateReminder(ReminderUpdateRequestDto dto, Long reminderNo){
         reminder.setTitle(dto.getTitle());
         reminder.setReminderDate(dto.getReminderDate());
         reminder.setIsAlarmSet(dto.getIsAlarmSet());
-        reminder.setAlarmTime(dto.getAlarmTime());
+        reminder.setAlarmTime(returnLocalDateTime(dto.getAlarmTime()));
         reminder.setReminderMemo(dto.getReminderMemo());
         reminder.setFriend(friend);
 
diff --git a/favor/src/main/java/com/favor/favor/reminder/ReminderUpdateRequestDto.java b/favor/src/main/java/com/favor/favor/reminder/ReminderUpdateRequestDto.java
index 9d65aa2..2c07f3d 100644
--- a/favor/src/main/java/com/favor/favor/reminder/ReminderUpdateRequestDto.java
+++ b/favor/src/main/java/com/favor/favor/reminder/ReminderUpdateRequestDto.java
@@ -21,8 +21,8 @@ public class ReminderUpdateRequestDto {
     @ApiModelProperty(position = 3, required = true, dataType = "Boolean", value = "알람설정여부", example = "페이버")
     private Boolean isAlarmSet;
 
-    @ApiModelProperty(position = 4, required = false, dataType = "LocalDateTime", value = "1996-02-29 00:00")
-    private LocalDateTime alarmTime;
+    @ApiModelProperty(position = 4, required = false, dataType = "String", value = "알람 시간", example = "1996-02-29 00:00")
+    private String alarmTime;
 
     @ApiModelProperty(position = 5, required = false, dataType = "String", value = "메모", example = "페이버")
     private String reminderMemo;