diff --git a/feedstock/recipe.py b/feedstock/recipe.py
index b7e3700..825d11f 100644
--- a/feedstock/recipe.py
+++ b/feedstock/recipe.py
@@ -64,7 +64,7 @@ def transfer(self, source_store) -> str:
         logger.warning(f"Copying from {source} to {target}")
   
         copy_proc = subprocess.run(
-            f'rclone copy --transfers 64 -vv -P "{gcs_remote}{source}/" "{osn_remote}{target}/"',
+            f'rclone copy --transfers 128 --checkers 256 -vv -P "{gcs_remote}{source}/" "{osn_remote}{target}/"',
             shell=True,
             capture_output=False, # will expose secrets if true
             text=True,