diff --git a/requirements.txt b/requirements.txt
index 03ee95a6..ee85b172 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
 pbr>=0.5.21,<1.0
 
-python-savannaclient>=0.3
+python-savannaclient>=0.4.0
diff --git a/savannadashboard/image_registry/tables.py b/savannadashboard/image_registry/tables.py
index 3791a656..e9c4604d 100644
--- a/savannadashboard/image_registry/tables.py
+++ b/savannadashboard/image_registry/tables.py
@@ -58,7 +58,7 @@ class UnregisterImages(tables.BatchAction):
 
     def action(self, request, obj_id):
         savanna = savannaclient(request)
-        savanna.images.update_image(obj_id, "", "")
+        savanna.images.unregister_image(obj_id)
 
 
 class ImageRegistryTable(tables.DataTable):