diff --git a/instellar.yml b/instellar.yml
index 07a1e4db..075e9540 100644
--- a/instellar.yml
+++ b/instellar.yml
@@ -82,3 +82,5 @@ kits:
         default_value: pro
       - key: UPLINK_SECRET
         driver: uplink/secret
+      - key: DATABASE_URL
+        default_value: "ecto:///"