diff --git a/cura/Settings/CuraContainerRegistry.py b/cura/Settings/CuraContainerRegistry.py
index 2dc341e71b..72b94a6f8d 100644
--- a/cura/Settings/CuraContainerRegistry.py
+++ b/cura/Settings/CuraContainerRegistry.py
@@ -19,6 +19,8 @@ from UM.Util import parseBool
 
 from . import ExtruderStack
 from . import GlobalStack
+from .ContainerManager import ContainerManager
+from .ExtruderManager import ExtruderManager
 
 from UM.i18n import i18nCatalog
 catalog = i18nCatalog("cura")