Backward compatibility

.gitignore

@@ -17,3 +17,4 @@ docs/_build/
 htmlcov/
 venv/
 .venv/
+.settings/

private_storage/servers.py

@@ -16,7 +16,7 @@ from django.utils.module_loading import import_string
 from django.views.static import serve, was_modified_since
 
 
-@lru_cache
+@lru_cache(maxsize=128)  # for backward compatibility
 def get_server_class(path):
     if '.' in path:
         return import_string(path)