diff --git a/dmforu-api/src/main/kotlin/com/dmforu/api/controller/old/request/Topic.kt b/dmforu-api/src/main/kotlin/com/dmforu/api/controller/old/request/Topic.kt
index ffab853..b3a30fc 100644
--- a/dmforu-api/src/main/kotlin/com/dmforu/api/controller/old/request/Topic.kt
+++ b/dmforu-api/src/main/kotlin/com/dmforu/api/controller/old/request/Topic.kt
@@ -5,7 +5,7 @@ import com.dmforu.domain.Generated
 @Generated
 enum class Topic (val korean: String){
     exam("시험"),
-    sign_up("수강"),
+    signup("수강"),
     speciallecture("특강"),
     seasonalsemester("계절학기"),
     leaveofabsence("휴학"),
diff --git a/dmforu-domain/src/main/kotlin/com/dmforu/domain/subscribe/Subscribe.kt b/dmforu-domain/src/main/kotlin/com/dmforu/domain/subscribe/Subscribe.kt
index 98cd6ca..8ad411c 100644
--- a/dmforu-domain/src/main/kotlin/com/dmforu/domain/subscribe/Subscribe.kt
+++ b/dmforu-domain/src/main/kotlin/com/dmforu/domain/subscribe/Subscribe.kt
@@ -4,15 +4,15 @@ import com.dmforu.domain.Generated
 
 class Subscribe private constructor(
     val token: String,
-    department: String,
-    keywords: List<String>,
+    department: String?,
+    keywords: List<String>?,
     isDepartmentSubscribed: Boolean,
     isKeywordSubscribed: Boolean,
 ) {
-    var department: String = department
+    var department: String? = department
         private set
 
-    var keywords: List<String> = keywords
+    var keywords: List<String>? = keywords
         private set
 
     var isDepartmentSubscribed: Boolean = isDepartmentSubscribed
@@ -24,8 +24,8 @@ class Subscribe private constructor(
     companion object {
         fun of(
             token: String,
-            department: String,
-            keywords: List<String>,
+            department: String?,
+            keywords: List<String>?,
             isDepartmentSubscribed: Boolean,
             isKeywordSubscribed: Boolean,
         ): Subscribe {
diff --git a/dmforu-infrastructure/storage/mysql/src/main/kotlin/com/dmforu/storage/db/mysql/subscribe/SubscribeEntity.kt b/dmforu-infrastructure/storage/mysql/src/main/kotlin/com/dmforu/storage/db/mysql/subscribe/SubscribeEntity.kt
index 8438b22..0943293 100644
--- a/dmforu-infrastructure/storage/mysql/src/main/kotlin/com/dmforu/storage/db/mysql/subscribe/SubscribeEntity.kt
+++ b/dmforu-infrastructure/storage/mysql/src/main/kotlin/com/dmforu/storage/db/mysql/subscribe/SubscribeEntity.kt
@@ -12,11 +12,11 @@ internal class SubscribeEntity(
     val token: String,
 
     @Column(nullable = true)
-    val department: String,
+    val department: String?,
 
     @Convert(converter = StringListConverter::class)
     @Column(name = "keywords_list", nullable = true)
-    val keywords: List<String>,
+    val keywords: List<String>?,
 
     @Column(name = "department_onoff")
     val isDepartmentSubscribed: Boolean,