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 3e43d62..b656826 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
@@ -132,7 +132,7 @@ val server = embeddedServer(Netty, port = 8080, ) {
                                 DiscordGuildCache.addGuild(guilds.associate {
                                     println("${it.id} ${it.name}")
 
-                                    it.id to Guild(it.id, it.name, it.icon, it.banner, it.roles)
+                                    it.id to Guild(it.id, it.name, it.icon, it.banner, it.roles ?: emptyList())
                                 })
 
                                 redirects[principal.state]?.let { redirect ->
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 627ffc1..83f9438 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
@@ -72,7 +72,7 @@ object DiscordGuildCache {
 
                 guilds.forEach {
                     cache[it.id] = CachedGuilds(
-                        Guild(it.id, it.name, it.icon, it.banner, it.roles),
+                        Guild(it.id, it.name, it.icon, it.banner, it.roles ?: emptyList()),
                         Instant.now().plusSeconds(EXP_SECONDS),
                         true
                     )
@@ -105,5 +105,5 @@ data class Guild(
     val name: String,
     val icon: String?,
     val banner: String?,
-    val roles: List<GuildRole>?,
+    val roles: List<GuildRole> = emptyList(),
 )
\ No newline at end of file