diff --git a/src/rockstor/smart_manager/views/base_service.py b/src/rockstor/smart_manager/views/base_service.py
index b8f6ed5ed..0ec5d4fed 100644
--- a/src/rockstor/smart_manager/views/base_service.py
+++ b/src/rockstor/smart_manager/views/base_service.py
@@ -90,9 +90,8 @@ def get_queryset(self, *args, **kwargs):
                 sos = []
                 for s in Service.objects.all():
                     sos.append(self._get_or_create_sso(s))
-                return sorted(
-                    sos, cmp=lambda x, y: cmp(x.display_name, y.display_name)
-                )  # noqa
+                # https://docs.python.org/3.6/howto/sorting.html#key-functions
+                return sorted(sos, key=lambda each: each.display_name)
 
 
 class BaseServiceDetailView(ServiceMixin, rfc.GenericView):