diff --git a/sql/sql/setup_02_create_table.sql b/sql/sql/setup_02_create_table.sql
index 484aaba..be0bd24 100644
--- a/sql/sql/setup_02_create_table.sql
+++ b/sql/sql/setup_02_create_table.sql
@@ -128,7 +128,7 @@ if not exists (select * from sysobjects where name='rents')
     CREATE TABLE rents (
     rent_id int identity not null,
     rent_date date default getdate(),
-    payment_date date not null,
+    payment_date date null,
     member_id int not null,
     rent_price_id int not null
     constraint rent_pk primary key (rent_id)