diff --git a/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/Main.kt b/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/Main.kt
index 8a0d067..3e43d62 100644
--- a/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/Main.kt
+++ b/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/Main.kt
@@ -285,7 +285,7 @@ data class DiscordGuildListAPI(
     val owner: Boolean,
     val permissions: Int,
     val features: List<String>,
-    val roles: List<GuildRole>
+    val roles: List<GuildRole>?
 )
 
 @Serializable
diff --git a/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/utils/DiscordGuildCache.kt b/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/utils/DiscordGuildCache.kt
index b339c84..627ffc1 100644
--- a/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/utils/DiscordGuildCache.kt
+++ b/webserver/src/main/kotlin/space/mori/chzzk_bot/webserver/utils/DiscordGuildCache.kt
@@ -105,5 +105,5 @@ data class Guild(
     val name: String,
     val icon: String?,
     val banner: String?,
-    val roles: List<GuildRole>,
+    val roles: List<GuildRole>?,
 )
\ No newline at end of file