diff --git a/db/migrations/pool/0004.sql b/db/migrations/pool/0004.sql
new file mode 100644
index 0000000000..3bc6e503b3
--- /dev/null
+++ b/db/migrations/pool/0004.sql
@@ -0,0 +1,11 @@
+-- +migrate Up
+ALTER TABLE pool.transaction
+ALTER COLUMN ip SET NOT NULL;
+ALTER TABLE pool.transaction
+ALTER COLUMN ip SET DEFAULT '';
+
+-- +migrate Down
+ALTER TABLE pool.transaction
+ALTER COLUMN ip DROP NOT NULL;
+ALTER TABLE pool.transaction
+ALTER COLUMN ip DROP DEFAULT;