diff --git a/gitlab/mixins.py b/gitlab/mixins.py
index 9c00c324d..c2ba6d096 100644
--- a/gitlab/mixins.py
+++ b/gitlab/mixins.py
@@ -382,9 +382,12 @@ def save(self, **kwargs):
 
         # call the manager
         obj_id = self.get_id()
+        if isinstance(obj_id, (str)):
+            obj_id = obj_id.replace('/', '%2F')
         server_data = self.manager.update(obj_id, updated_data, **kwargs)
         if server_data is not None:
             self._update_attrs(server_data)
+        return server_data
 
 
 class ObjectDeleteMixin(object):