diff --git a/vberetar/postgresql/sql_filters.sql b/vberetar/postgresql/sql_filters.sql
index 423f131..74925dd 100644
--- a/vberetar/postgresql/sql_filters.sql
+++ b/vberetar/postgresql/sql_filters.sql
@@ -5,7 +5,7 @@ SELECT name, category, price,
 FROM products
 WHERE (price BETWEEN 100 AND 1300) 
     AND category NOT IN ('smartwatch')
-    AND in_stock = 'true';
+    AND in_stock = TRUE;
 
 -- Вопрос: 
 -- Что лучше читается BETWEEN 100 AND 1300 или price >= 100 AND price <= 1300 и почему?