diff --git a/sql/create/tables.sql b/sql/create/tables.sql
index acd668c..785dc53 100644
--- a/sql/create/tables.sql
+++ b/sql/create/tables.sql
@@ -41,8 +41,10 @@ create table crew (
     on update cascade on delete cascade,
     crew_name text unique not null,
     is_active boolean not null default true,
+
     created_at timestamp not null default current_timestamp,
-    updated_at timestamp not null default current_timestamp,
+    updated_at timestamp not null default current_timestamp
+    check (updated_at >= created_at),
 
     primary key (id)
 );