diff --git a/dms-core/src/main/kotlin/team/aliens/dms/domain/outing/spi/vo/OutingApplicationVO.kt b/dms-core/src/main/kotlin/team/aliens/dms/domain/outing/spi/vo/OutingApplicationVO.kt
index 49895bde2..0912b5325 100644
--- a/dms-core/src/main/kotlin/team/aliens/dms/domain/outing/spi/vo/OutingApplicationVO.kt
+++ b/dms-core/src/main/kotlin/team/aliens/dms/domain/outing/spi/vo/OutingApplicationVO.kt
@@ -9,7 +9,7 @@ open class OutingApplicationVO(
     val studentGrade: Int,
     val studentClassRoom: Int,
     val studentNumber: Int,
-    val reason: String,
+    val reason: String?,
     val outingType: String,
     val outingDate: LocalDate,
     val outingTime: LocalTime,
diff --git a/dms-persistence/src/main/kotlin/team/aliens/dms/persistence/outing/OutingApplicationPersistenceAdapter.kt b/dms-persistence/src/main/kotlin/team/aliens/dms/persistence/outing/OutingApplicationPersistenceAdapter.kt
index e043e95d1..cd371ec5e 100644
--- a/dms-persistence/src/main/kotlin/team/aliens/dms/persistence/outing/OutingApplicationPersistenceAdapter.kt
+++ b/dms-persistence/src/main/kotlin/team/aliens/dms/persistence/outing/OutingApplicationPersistenceAdapter.kt
@@ -65,8 +65,8 @@ class OutingApplicationPersistenceAdapter(
                             studentJpaEntity.grade,
                             studentJpaEntity.classRoom,
                             studentJpaEntity.number,
-                            outingApplicationJpaEntity.reason.coalesce(""),
-                            outingApplicationJpaEntity.reason.coalesce(""),
+                            outingApplicationJpaEntity.reason,
+                            outingApplicationJpaEntity.reason,
                             outingApplicationJpaEntity.outingDate,
                             outingApplicationJpaEntity.outingTime,
                             outingApplicationJpaEntity.arrivalTime,