diff --git a/priv/repo/migrations/20211004004848_require_user_id.exs b/priv/repo/migrations/20211004004848_require_user_id.exs
new file mode 100644
index 0000000..82da4bf
--- /dev/null
+++ b/priv/repo/migrations/20211004004848_require_user_id.exs
@@ -0,0 +1,9 @@
+defmodule UserPreferences.Repo.Migrations.RequireUserId do
+  use Ecto.Migration
+
+  def change do
+    alter table(:preferences) do
+      modify :user_id, :integer, null: false
+    end
+  end
+end