diff --git a/Runtime/FSM/FsmModule.cs b/Runtime/FSM/FsmModule.cs
index 6c349ab..b408ee8 100644
--- a/Runtime/FSM/FsmModule.cs
+++ b/Runtime/FSM/FsmModule.cs
@@ -8,7 +8,7 @@ using Object = UnityEngine.Object;
 namespace AlicizaX.Fsm.Runtime
 {
     [Preserve]
-    public sealed class FsmModule : IFsmModule
+    internal sealed class FsmModule : IFsmModule
     {
         private readonly List<IFsmRunner> _active = new List<IFsmRunner>(256);
         private readonly List<IFsmRunner> _toRemove = new List<IFsmRunner>(64);
diff --git a/Runtime/Localization/Manager/LocalizationModule.cs b/Runtime/Localization/Manager/LocalizationModule.cs
index e5a2b55..a19087f 100644
--- a/Runtime/Localization/Manager/LocalizationModule.cs
+++ b/Runtime/Localization/Manager/LocalizationModule.cs
@@ -8,7 +8,7 @@ namespace AlicizaX.Localization.Runtime
     /// 本地化管理器。
     /// </summary>
     [UnityEngine.Scripting.Preserve]
-    public sealed partial class LocalizationModule : ILocalizationModule
+    internal sealed partial class LocalizationModule : ILocalizationModule
     {
         private readonly Dictionary<string, string> Dic = new();
         private Language _language;
diff --git a/Runtime/Timer/TimerModule.cs b/Runtime/Timer/TimerModule.cs
index 7546e78..694e8be 100644
--- a/Runtime/Timer/TimerModule.cs
+++ b/Runtime/Timer/TimerModule.cs
@@ -8,7 +8,7 @@ namespace AlicizaX.Timer.Runtime
     public delegate void TimerHandler(params object[] args);
 
     [Serializable]
-    public class Timer : IMemory
+    internal class Timer : IMemory
     {
         public int TimerId;
         public float TriggerTime;