diff --git a/LZX/Bits.cs b/LZX/Bits.cs
index e8a7a02..2399559 100644
--- a/LZX/Bits.cs
+++ b/LZX/Bits.cs
@@ -1,7 +1,7 @@
 namespace SabreTools.Compression.LZX
 {
     /// <see href="https://github.com/wine-mirror/wine/blob/master/dlls/cabinet/cabinet.h"/>
-    public class Bits
+    internal class Bits
     {
         public uint BitBuffer;
 
diff --git a/LZX/Decompressor.cs b/LZX/Decompressor.cs
index 9fd2e4e..c5444b6 100644
--- a/LZX/Decompressor.cs
+++ b/LZX/Decompressor.cs
@@ -6,7 +6,7 @@ using static SabreTools.Models.MicrosoftCabinet.Constants;
 namespace SabreTools.Compression.LZX
 {
     /// <see href="https://github.com/wine-mirror/wine/blob/master/dlls/cabinet/fdi.c"/>
-    public class Decompressor
+    internal class Decompressor
     {
         /// <summary>
         /// Initialize an LZX decompressor state
diff --git a/LZX/State.cs b/LZX/State.cs
index b5839dd..358b0bb 100644
--- a/LZX/State.cs
+++ b/LZX/State.cs
@@ -3,7 +3,7 @@ using static SabreTools.Models.Compression.LZX.Constants;
 namespace SabreTools.Compression.LZX
 {
     /// <see href="https://github.com/wine-mirror/wine/blob/master/dlls/cabinet/cabinet.h"/>
-    public class State
+    internal class State
     {
         /// <summary>
         /// the actual decoding window
diff --git a/MSZIP/Decompressor.cs b/MSZIP/Decompressor.cs
index fe2d1f4..10156d3 100644
--- a/MSZIP/Decompressor.cs
+++ b/MSZIP/Decompressor.cs
@@ -6,7 +6,7 @@ using static SabreTools.Models.Compression.MSZIP.Constants;
 namespace SabreTools.Compression.MSZIP
 {
     /// <see href="https://github.com/wine-mirror/wine/blob/master/dlls/cabinet/fdi.c"/>
-    public unsafe class Decompressor
+    internal unsafe class Decompressor
     {
         /// <summary>
         /// Decompress a byte array using a given State
diff --git a/MSZIP/HuffmanNode.cs b/MSZIP/HuffmanNode.cs
index 85fa0fd..bcb6388 100644
--- a/MSZIP/HuffmanNode.cs
+++ b/MSZIP/HuffmanNode.cs
@@ -1,6 +1,6 @@
 namespace SabreTools.Compression.MSZIP
 {
-    public unsafe struct HuffmanNode
+    internal unsafe struct HuffmanNode
     {
         /// <summary>
         /// Number of extra bits or operation
diff --git a/MSZIP/State.cs b/MSZIP/State.cs
index 9020ab6..6703e63 100644
--- a/MSZIP/State.cs
+++ b/MSZIP/State.cs
@@ -3,7 +3,7 @@ using static SabreTools.Models.Compression.MSZIP.Constants;
 namespace SabreTools.Compression.MSZIP
 {
     /// <see href="https://github.com/wine-mirror/wine/blob/master/dlls/cabinet/cabinet.h"/>
-    public unsafe class State
+    internal unsafe class State
     {
         /// <summary>
         /// Current offset within the window
diff --git a/Quantum/Decompressor.cs b/Quantum/Decompressor.cs
index d36a9ce..5dd3578 100644
--- a/Quantum/Decompressor.cs
+++ b/Quantum/Decompressor.cs
@@ -9,7 +9,7 @@ namespace SabreTools.Compression.Quantum
     /// <see href="https://github.com/wine-mirror/wine/blob/master/dlls/cabinet/fdi.c"/>
     /// <see href="https://github.com/wine-mirror/wine/blob/master/include/fdi.h"/>
     /// <see href="http://www.russotto.net/quantumcomp.html"/>
-    public static class Decompressor
+    internal static class Decompressor
     {
         /// <summary>
         /// Decompress a byte array using a given State
diff --git a/Quantum/State.cs b/Quantum/State.cs
index 128c876..a340a3c 100644
--- a/Quantum/State.cs
+++ b/Quantum/State.cs
@@ -4,7 +4,7 @@ namespace SabreTools.Compression.Quantum
 {
     /// <see href="https://github.com/kyz/libmspack/blob/master/libmspack/mspack/qtmd.c"/>
     /// <see href="https://github.com/wine-mirror/wine/blob/master/dlls/cabinet/cabinet.h"/>
-    public class State
+    internal class State
     {
         /// <summary>
         /// The actual decoding window