diff --git a/src/SharpCompress/Compressors/LZMA/LZipStream.cs b/src/SharpCompress/Compressors/LZMA/LZipStream.cs
index 3b243b00..88f85c87 100644
--- a/src/SharpCompress/Compressors/LZMA/LZipStream.cs
+++ b/src/SharpCompress/Compressors/LZMA/LZipStream.cs
@@ -14,7 +14,7 @@ namespace SharpCompress.Compressors.LZMA
     /// <summary>
     /// Stream supporting the LZIP format, as documented at http://www.nongnu.org/lzip/manual/lzip_manual.html
     /// </summary>
-    public class LZipStream : Stream
+    public sealed class LZipStream : Stream
     {
         private readonly Stream _stream;
         private readonly CountingWritableSubStream? _countingWritableSubStream;