diff --git a/src/Tasks/Copy.cs b/src/Tasks/Copy.cs
index 96a0e17089b..641ed43193f 100644
--- a/src/Tasks/Copy.cs
+++ b/src/Tasks/Copy.cs
@@ -61,7 +61,9 @@ private static void InitializeCopyThreads()
                     {
                         AutoResetEvent autoResetEvent = new AutoResetEvent(false);
                         copyThreadSignals[i] = autoResetEvent;
-                        Thread newThread = new Thread(ParallelCopyTask);
+
+                        // specify the smallest stack size - 64kb
+                        Thread newThread = new Thread(ParallelCopyTask, 64 * 1024);
                         newThread.IsBackground = true;
                         newThread.Name = "Parallel Copy Thread";
                         newThread.Start(autoResetEvent);