diff --git a/Recyclable.Collections/RecyclableQueue.cs b/Recyclable.Collections/RecyclableQueue.cs
index ed00fe4..070ebcd 100644
--- a/Recyclable.Collections/RecyclableQueue.cs
+++ b/Recyclable.Collections/RecyclableQueue.cs
@@ -4,7 +4,7 @@ using System.Runtime.CompilerServices;
 
 namespace Recyclable.Collections
 {
-	public class RecyclableQueue<T> : IRecyclableOwner<T>, IList<T>, IDisposable
+	internal class RecyclableQueue<T> : IRecyclableOwner<T>, IList<T>, IDisposable
 	{
 		private static readonly ArrayPool<T> _arrayPool = ArrayPool<T>.Create();
 		private static readonly IEqualityComparer<T> _equalityComparer = EqualityComparer<T>.Default;
diff --git a/Recyclable.Collections/RecyclableSortedList.cs b/Recyclable.Collections/RecyclableSortedList.cs
index b947e9d..d1d9ede 100644
--- a/Recyclable.Collections/RecyclableSortedList.cs
+++ b/Recyclable.Collections/RecyclableSortedList.cs
@@ -1,6 +1,6 @@
 namespace Recyclable.Collections
 {
-	public class RecyclableSortedList<TKey, TValue> : RecyclableLongList<(TKey Key, TValue Value)>
+	internal class RecyclableSortedList<TKey, TValue> : RecyclableLongList<(TKey Key, TValue Value)>
 		where TKey : notnull
 	{
 		private static readonly IComparer<(TKey, TValue)> _comparer = new FrequencyTupleComparer<TKey, TValue>();
diff --git a/Recyclable.Collections/RecyclableStack.cs b/Recyclable.Collections/RecyclableStack.cs
index 50d7140..b885708 100644
--- a/Recyclable.Collections/RecyclableStack.cs
+++ b/Recyclable.Collections/RecyclableStack.cs
@@ -2,7 +2,7 @@
 
 namespace Recyclable.Collections
 {
-	public class RecyclableStack<T> : IList<T>, IDisposable
+	internal class RecyclableStack<T> : IList<T>, IDisposable
 	{
 		private bool _disposedValue;
 		private readonly int _blockSize;