diff --git a/ultrasonic/src/main/kotlin/org/moire/ultrasonic/domain/ChatMessage.kt b/ultrasonic/src/main/kotlin/org/moire/ultrasonic/domain/ChatMessage.kt
index 637df5ee..35e112e2 100644
--- a/ultrasonic/src/main/kotlin/org/moire/ultrasonic/domain/ChatMessage.kt
+++ b/ultrasonic/src/main/kotlin/org/moire/ultrasonic/domain/ChatMessage.kt
@@ -2,7 +2,7 @@ package org.moire.ultrasonic.domain
 
 import java.io.Serializable
 
-class ChatMessage(
+data class ChatMessage(
         val username: String,
         val time: Long,
         val message: String