diff --git a/storage/models.py b/storage/models.py
index 4977db1..bd744c2 100644
--- a/storage/models.py
+++ b/storage/models.py
@@ -18,6 +18,7 @@ STATES = (
     ('taken', 'Taken'),
     ('broken', 'Broken'),
     ('missing', 'Missing'),
+    ('depleted', 'Depleted'),
 )