diff --git a/Misaki.HighPerformance.LowLevel/Collections/UnsafeBitSet.cs b/Misaki.HighPerformance.LowLevel/Collections/UnsafeBitSet.cs
index 49653a5..9b0ce91 100644
--- a/Misaki.HighPerformance.LowLevel/Collections/UnsafeBitSet.cs
+++ b/Misaki.HighPerformance.LowLevel/Collections/UnsafeBitSet.cs
@@ -260,7 +260,10 @@ public unsafe struct UnsafeBitSet : IDisposable, IEquatable<UnsafeBitSet>
         var length = RoundToPadding(uints);
 
         _bits.Resize(length, option);
-        _bits.AsSpan()[oldSize..].Clear();
+        if (!option.HasFlag(AllocationOption.Clear))
+        {
+            _bits.AsSpan()[oldSize..].Clear();
+        }
     }
 
     /// <summary>
diff --git a/Misaki.HighPerformance.LowLevel/Collections/UnsafeSlotMap.cs b/Misaki.HighPerformance.LowLevel/Collections/UnsafeSlotMap.cs
index b4b50d5..748c184 100644
--- a/Misaki.HighPerformance.LowLevel/Collections/UnsafeSlotMap.cs
+++ b/Misaki.HighPerformance.LowLevel/Collections/UnsafeSlotMap.cs
@@ -288,7 +288,7 @@ public unsafe struct UnsafeSlotMap<T> : IUnsafeCollection<T>
     public void Resize(int newSize, AllocationOption option = AllocationOption.None)
     {
         _data.Resize(newSize, option);
-        _generations.Resize(newSize, option);
+        _generations.Resize(newSize, option | AllocationOption.Clear);
         _freeSlots.Resize(newSize, option);
         _validBits.Resize(newSize, option);
 
diff --git a/Misaki.HighPerformance.LowLevel/Misaki.HighPerformance.LowLevel.csproj b/Misaki.HighPerformance.LowLevel/Misaki.HighPerformance.LowLevel.csproj
index bfed842..3fcf12f 100644
--- a/Misaki.HighPerformance.LowLevel/Misaki.HighPerformance.LowLevel.csproj
+++ b/Misaki.HighPerformance.LowLevel/Misaki.HighPerformance.LowLevel.csproj
@@ -6,7 +6,7 @@
     <Nullable>enable</Nullable>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <Authors>Misaki</Authors>
-    <AssemblyVersion>1.3.1</AssemblyVersion>
+    <AssemblyVersion>1.3.2</AssemblyVersion>
     <Version>$(AssemblyVersion)</Version>
     <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
     <PackageProjectUrl>https://git.personalnas.com/Misaki/Misaki.HighPerformance.git</PackageProjectUrl>
diff --git a/Misaki.HighPerformance.Test/Program.cs b/Misaki.HighPerformance.Test/Program.cs
index b8b78da..9154a9e 100644
--- a/Misaki.HighPerformance.Test/Program.cs
+++ b/Misaki.HighPerformance.Test/Program.cs
@@ -26,6 +26,6 @@ using Misaki.HighPerformance.Collections;
 using Misaki.HighPerformance.LowLevel.Buffer;
 using Misaki.HighPerformance.LowLevel.Collections;
 
-var csm = new ConcurrentSlotMap<int>();
+var csm = new UnsafeSlotMap<int>();
 Console.WriteLine(csm.Contains(0, 0));
 Console.WriteLine(csm.Count == 0);
\ No newline at end of file