diff --git a/db/migrate/20180228070431_change_invoice_vat_rate_to_null.rb b/db/migrate/20180228070431_change_invoice_vat_rate_to_null.rb
new file mode 100644
index 000000000..37b8394b5
--- /dev/null
+++ b/db/migrate/20180228070431_change_invoice_vat_rate_to_null.rb
@@ -0,0 +1,5 @@
+class ChangeInvoiceVatRateToNull < ActiveRecord::Migration
+  def change
+    change_column_null :invoices, :vat_rate, true
+  end
+end
diff --git a/db/structure.sql b/db/structure.sql
index 3f890fcd9..ba040e7cd 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -1127,7 +1127,7 @@ CREATE TABLE invoices (
     currency character varying NOT NULL,
     description character varying,
     reference_no character varying,
-    vat_rate numeric(4,3) NOT NULL,
+    vat_rate numeric(4,3),
     paid_at timestamp without time zone,
     seller_id integer,
     seller_name character varying NOT NULL,
@@ -5119,3 +5119,5 @@ INSERT INTO schema_migrations (version) VALUES ('20180228064342');
 
 INSERT INTO schema_migrations (version) VALUES ('20180228070102');
 
+INSERT INTO schema_migrations (version) VALUES ('20180228070431');
+