diff --git a/nemo2riva/cookbook.py b/nemo2riva/cookbook.py
index 1c7be66..70ac7e9 100644
--- a/nemo2riva/cookbook.py
+++ b/nemo2riva/cookbook.py
@@ -161,7 +161,8 @@ def save_archive(model, save_path, cfg, artifacts, metadata):
     logging.info("Saving to {}".format(save_path))
     # Create EFF archive.
     Archive.save_registry(
-        save_path=save_path, registry_name="artifacts", registry=artifacts, **metadata,
+        save_path=save_path, registry_name="artifacts", registry=artifacts,
+        tarfile_open_options={'compresslevel': 0, 'copybufsize': 64*1024*1024}, **metadata,
     )
     del artifacts
     gc.collect()
diff --git a/requirements.txt b/requirements.txt
index d0be80f..c7fda6f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,6 +3,6 @@
 
 pyarmor<8
 nemo_toolkit>=1.6.0
-nvidia-eff>=0.5.3,<=0.6.2
+nvidia-eff>=0.5.3
 onnxruntime-gpu>=1.13.1
 onnx_graphsurgeon