diff --git a/longs/views.py b/longs/views.py
index 40bddab4..368ff741 100755
--- a/longs/views.py
+++ b/longs/views.py
@@ -64,6 +64,8 @@ from rest_framework import viewsets
 
 from .serializers import ExamSerializer
 
+import os
+
 logger = logging.getLogger(__name__)