diff --git a/seminar/models/tvorba.py b/seminar/models/tvorba.py
index 3e914efd..fdf91273 100644
--- a/seminar/models/tvorba.py
+++ b/seminar/models/tvorba.py
@@ -6,6 +6,7 @@ import tempfile
 import logging
 
 from django.contrib.sites.shortcuts import get_current_site
+from django.core.files.storage import FileSystemStorage
 from django.db import models
 from django.utils import timezone
 from django.conf import settings