diff --git a/migrations/0004_add_secret.sql b/migrations/0004_add_secret.sql
new file mode 100644
index 0000000..b3463ef
--- /dev/null
+++ b/migrations/0004_add_secret.sql
@@ -0,0 +1,4 @@
+-- Migration: Add secret column to offers table
+-- Allows offers to be protected with a secret that answerers must provide
+
+ALTER TABLE offers ADD COLUMN secret TEXT;