diff --git a/.gitignore b/.gitignore
index 6ac455c..c6492d7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,3 +17,4 @@ docs/_build/
 htmlcov/
 venv/
 .venv/
+.settings/
diff --git a/private_storage/servers.py b/private_storage/servers.py
index 16156fd..561e414 100644
--- a/private_storage/servers.py
+++ b/private_storage/servers.py
@@ -16,7 +16,7 @@
 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)