diff --git a/src/FilterLists.Agent/ListArchiver/DownloadLists.cs b/src/FilterLists.Agent/ListArchiver/DownloadLists.cs
index 6faaff8a5..39b127c20 100644
--- a/src/FilterLists.Agent/ListArchiver/DownloadLists.cs
+++ b/src/FilterLists.Agent/ListArchiver/DownloadLists.cs
@@ -21,7 +21,10 @@ public Command(IEnumerable<ListInfo> listInfo)
 
         public class Handler : AsyncRequestHandler<Command>
         {
-            private const int MaxDegreeOfParallelism = 25;
+            //TODO: sort lists and use domain sharding for concurrent downloads 
+            //TODO: manual/auto-tune degrees of parallelism
+            private const int MaxDegreeOfParallelism = 5;
+
             private readonly IMediator _mediator;
 
             public Handler(IMediator mediator)