diff --git a/Nbt/Util/IndentedWriter.cs b/Nbt/Util/IndentedWriter.cs
index 0902fd7..2c23cf6 100755
--- a/Nbt/Util/IndentedWriter.cs
+++ b/Nbt/Util/IndentedWriter.cs
@@ -2,7 +2,7 @@ using System.Text;
 
 namespace Nbt;
 
-public sealed class IndentedWriter(TextWriter baseWriter, string indent, bool leaveOpen = false) : TextWriter
+internal sealed class IndentedWriter(TextWriter baseWriter, string indent, bool leaveOpen = false) : TextWriter
 {
     private readonly TextWriter baseWriter = baseWriter;
     private readonly string indent = indent;
diff --git a/Nbt/Util/QuotedWriter.cs b/Nbt/Util/QuotedWriter.cs
index 0537d53..84a4b8f 100755
--- a/Nbt/Util/QuotedWriter.cs
+++ b/Nbt/Util/QuotedWriter.cs
@@ -2,7 +2,7 @@ using System.Text;
 
 namespace Nbt;
 
-public sealed class QuotedWriter(TextWriter baseWriter, char quoteChar, char escapeChar, bool leaveOpen = false) : TextWriter
+internal sealed class QuotedWriter(TextWriter baseWriter, char quoteChar, char escapeChar, bool leaveOpen = false) : TextWriter
 {
     private readonly TextWriter baseWriter = baseWriter;
     private readonly char quoteChar = quoteChar;