diff --git a/models.py b/models.py
index 6bbdf1e..e78cf34 100644
--- a/models.py
+++ b/models.py
@@ -7,7 +7,7 @@ class Repo(peewee.Model):
     name = peewee.CharField()
     url = peewee.CharField()
     revision = peewee.CharField()
-    app_list = peewee.CharField()
+    app_list = peewee.CharField(null=True)
 
     class Meta:
         database = db