diff --git a/src/main/kotlin/com/android/trisolarisserver/controller/TemporaryRoomCards.kt b/src/main/kotlin/com/android/trisolarisserver/controller/TemporaryRoomCards.kt
index 5f759a8..1298c6b 100644
--- a/src/main/kotlin/com/android/trisolarisserver/controller/TemporaryRoomCards.kt
+++ b/src/main/kotlin/com/android/trisolarisserver/controller/TemporaryRoomCards.kt
@@ -145,12 +145,12 @@ class TemporaryRoomCards(
         cardIndex: Int,
         issuedAt: OffsetDateTime,
         expiresAt: OffsetDateTime
-    ): Sector0Payload {
+    ): TempSector0Payload {
         val key = buildSector0Block2(roomNumber, cardIndex)
         val newData = "0000000000" + formatDateComponents(issuedAt) + formatDateComponents(expiresAt)
         val checkSum = calculateChecksum(key + newData)
         val finalData = newData + checkSum
-        return Sector0Payload(key, finalData)
+        return TempSector0Payload(key, finalData)
     }
 
     private fun buildSector0Block2(roomNumber: Int, cardID: Int): String {
@@ -203,7 +203,7 @@ class TemporaryRoomCards(
     }
 }
 
-private data class Sector0Payload(
+private data class TempSector0Payload(
     val key: String,
     val timeData: String
 )