diff --git a/src/Toimik.WarcProtocol/CompressionStreamFactory.cs b/src/Toimik.WarcProtocol/CompressionStreamFactory.cs
index c8c29ad..e08594b 100644
--- a/src/Toimik.WarcProtocol/CompressionStreamFactory.cs
+++ b/src/Toimik.WarcProtocol/CompressionStreamFactory.cs
@@ -16,17 +16,13 @@
 
 namespace Toimik.WarcProtocol;
 
-using ICSharpCode.SharpZipLib.GZip;
 using System.IO;
+using System.IO.Compression;
 
 public class CompressionStreamFactory
 {
-    public CompressionStreamFactory()
-    {
-    }
-
     public virtual Stream CreateDecompressStream(Stream stream)
     {
-        return new GZipInputStream(stream);
+        return new GZipStream(stream, CompressionMode.Decompress);
     }
 }
\ No newline at end of file
diff --git a/src/Toimik.WarcProtocol/Toimik.WarcProtocol.csproj b/src/Toimik.WarcProtocol/Toimik.WarcProtocol.csproj
index f9839eb..15afe0e 100644
--- a/src/Toimik.WarcProtocol/Toimik.WarcProtocol.csproj
+++ b/src/Toimik.WarcProtocol/Toimik.WarcProtocol.csproj
@@ -25,7 +25,6 @@
 
   <ItemGroup>
     <PackageReference Include="BouncyCastle.Cryptography" Version="2.6.2" />
-    <PackageReference Include="SharpZipLib" Version="1.4.2" />
     <PackageReference Include="StyleCop.Analyzers" Version="1.1.118">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>