diff --git a/rhodecode/apps/admin/views/defaults.py b/rhodecode/apps/admin/views/defaults.py
index a0532693..cacc8dcf 100644
--- a/rhodecode/apps/admin/views/defaults.py
+++ b/rhodecode/apps/admin/views/defaults.py
@@ -45,10 +45,9 @@ class AdminDefaultSettingsView(BaseAppView):
     @HasPermissionAllDecorator("hg.admin")
     def defaults_repository_show(self):
         c = self.load_default_context()
-        c.backends = BACKENDS.keys()
+        c.backends = list(BACKENDS.keys())
         c.active = "repositories"
         defaults = SettingsModel().get_default_repo_settings()
-
         data = render("rhodecode:templates/admin/defaults/defaults.mako", self._get_template_context(c), self.request)
         html = formencode.htmlfill.render(data, defaults=defaults, encoding="UTF-8", force_defaults=False)
         return Response(html)
@@ -61,7 +60,6 @@ class AdminDefaultSettingsView(BaseAppView):
         c = self.load_default_context()
         c.active = "repositories"
         form = DefaultsForm(self.request.translate)()
-
         try:
             form_result = form.to_python(dict(self.request.POST))
             for k, v in form_result.items():
diff --git a/rhodecode/model/forms.py b/rhodecode/model/forms.py
index ee5258be..2dc35b1c 100644
--- a/rhodecode/model/forms.py
+++ b/rhodecode/model/forms.py
@@ -275,7 +275,7 @@ def RepoForm(localizer, edit=False, old_data=None, repo_groups=None, allow_disab
     _ = localizer
     old_data = old_data or {}
     repo_groups = repo_groups or []
-    supported_backends = BACKENDS.keys()
+    supported_backends = list(BACKENDS.keys())
 
     class _RepoForm(formencode.Schema):
         allow_extra_fields = True