diff --git a/src/SharpCompress/Common/Lzw/LzwVolume.cs b/src/SharpCompress/Common/Lzw/LzwVolume.cs
index 83060cf5..46cd8d25 100644
--- a/src/SharpCompress/Common/Lzw/LzwVolume.cs
+++ b/src/SharpCompress/Common/Lzw/LzwVolume.cs
@@ -13,5 +13,5 @@ public class LzwVolume : Volume
 
     public override bool IsFirstVolume => true;
 
-    public override bool IsMultiVolume => true;
+    public override bool IsMultiVolume => false;
 }
diff --git a/src/SharpCompress/Factories/LzwFactory.cs b/src/SharpCompress/Factories/LzwFactory.cs
index e60451ac..00083c3d 100644
--- a/src/SharpCompress/Factories/LzwFactory.cs
+++ b/src/SharpCompress/Factories/LzwFactory.cs
@@ -26,7 +26,7 @@ public class LzwFactory : Factory, IReaderFactory
     /// <inheritdoc/>
     public override IEnumerable<string> GetSupportedExtensions()
     {
-        yield return "Z";
+        yield return "z";
     }
 
     /// <inheritdoc/>