diff --git a/client-cli/cli_lib/ceph.py b/client-cli/cli_lib/ceph.py
index 5d710617..7ed85bb4 100644
--- a/client-cli/cli_lib/ceph.py
+++ b/client-cli/cli_lib/ceph.py
@@ -876,7 +876,7 @@ def ceph_volume_upload(config, pool, volume, image_format, image_file):
 
     bar = UploadProgressBar(image_file, end_message="Parsing file on remote side...", end_nl=False)
     upload_data = MultipartEncoder(
-        fields={ 'file': ('filename', open(image_file, 'rb'), 'text/plain')}
+        fields={ 'file': ('filename', open(image_file, 'rb'), 'application/octet-stream')}
     )
     upload_monitor = MultipartEncoderMonitor(upload_data, bar.update)
 
diff --git a/client-cli/cli_lib/provisioner.py b/client-cli/cli_lib/provisioner.py
index 3946f6cd..33cc86d4 100644
--- a/client-cli/cli_lib/provisioner.py
+++ b/client-cli/cli_lib/provisioner.py
@@ -435,7 +435,7 @@ def ova_upload(config, name, ova_file, params):
 
     bar = UploadProgressBar(ova_file, end_message="Parsing file on remote side...", end_nl=False)
     upload_data = MultipartEncoder(
-        fields={ 'file': ('filename', open(ova_file, 'rb'), 'text/plain')}
+        fields={ 'file': ('filename', open(ova_file, 'rb'), 'application/octet-stream')}
     )
     upload_monitor = MultipartEncoderMonitor(upload_data, bar.update)