1 files changed, 4 insertions, 1 deletions
diff --git a/views.py b/views.py
index de510a3..ebcf4ff 100644
--- a/views.py
+++ b/views.py
@@ -86,7 +86,10 @@ def timetable_common(request, obj, year=None, week=None, timetable=None):
     elif (int(year), int(week)) < (current_year, current_week):
         is_old_timetable = True
 
-    start, end = get_week(year, week)
+    try:
+        start, end = get_week(year, week)
+    except ValueError:
+        raise Http404
 
     courses = Course.objects.get_courses(obj, begin__gte=start, begin__lt=end)
     if not courses.exists() and provided_week: