diff --git a/HellionChat/Configuration.cs b/HellionChat/Configuration.cs
index e93adaa..3200a5b 100755
--- a/HellionChat/Configuration.cs
+++ b/HellionChat/Configuration.cs
@@ -34,7 +34,7 @@ public class ConfigKeyBind
 [Serializable]
 public class Configuration : IPluginConfiguration
 {
-    private const int LatestVersion = 17;
+    private const int LatestVersion = 18;
 
     public int Version { get; set; } = LatestVersion;
 
diff --git a/HellionChat/Plugin.cs b/HellionChat/Plugin.cs
index fa37ccf..dd9a8dd 100755
--- a/HellionChat/Plugin.cs
+++ b/HellionChat/Plugin.cs
@@ -198,10 +198,12 @@ public sealed class Plugin : IAsyncDalamudPlugin
         // point (MigrateFromChatTwoLayout, LanguageChanged, ImGuiUtil.Initialize)
         // do not touch either static, so the brief null-window is safe.
 
-        // Schema gate: v1.4.x requires config v16+. Users on older schemas
-        // must install v1.4.2 first to run the migration chain. v17 adds
-        // Tab.IsPinned (additive, no data migration needed) so v16 configs
-        // load cleanly and get their Version stamp bumped after the gate.
+        // Schema gate: v1.4.x+ requires config v16+. Users on older schemas
+        // must install v1.4.2 first to run the migration chain. v18 adds the
+        // per-tab EnableNotificationSound + NotificationSoundId fields (UI-3)
+        // and the top-level NotifyFailedTell flag (UI-2) — all additive with
+        // defaults, so v16/v17 configs load cleanly and get their Version
+        // stamp bumped after the gate.
         if (Config.Version < 16)
         {
             throw new InvalidOperationException(
@@ -209,7 +211,7 @@ public sealed class Plugin : IAsyncDalamudPlugin
                     + "Please install v1.4.2 first to migrate the configuration, then upgrade to v1.4.10."
             );
         }
-        Config.Version = 17;
+        Config.Version = 18;
 
         // Unpinned TempTabs are session-only and dropped on every load. Pinned
         // TempTabs survive reload — Jin's tester feedback (v1.4.7).