diff --git a/src/TimeZoneConverter.DataBuilder/Downloader.cs b/src/TimeZoneConverter.DataBuilder/Downloader.cs
index 07f029d..3507e26 100644
--- a/src/TimeZoneConverter.DataBuilder/Downloader.cs
+++ b/src/TimeZoneConverter.DataBuilder/Downloader.cs
@@ -59,7 +59,7 @@ private static async Task DownloadAndExtractAsync(string url, string dir)
         while (reader.MoveToNextEntry())
         {
             var entry = reader.Entry;
-            if (entry.IsDirectory)
+            if (entry.IsDirectory || entry.Key == null)
             {
                 continue;
             }
diff --git a/src/TimeZoneConverter.DataBuilder/TimeZoneConverter.DataBuilder.csproj b/src/TimeZoneConverter.DataBuilder/TimeZoneConverter.DataBuilder.csproj
index 4d5e2a2..7e18cf8 100644
--- a/src/TimeZoneConverter.DataBuilder/TimeZoneConverter.DataBuilder.csproj
+++ b/src/TimeZoneConverter.DataBuilder/TimeZoneConverter.DataBuilder.csproj
@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="SharpCompress" Version="0.32.2" />
+    <PackageReference Include="SharpCompress" Version="0.41.0" />
   </ItemGroup>
 
 </Project>