diff --git a/db.bib b/db.bib
index 700c83e..3a5abab 100644
--- a/db.bib
+++ b/db.bib
@@ -5,6 +5,6 @@
 	month = may,
 	language = {russian},
 	note = {[Online; accessed 1. May 2023]},
-	url = {https://www.postgrespro.ru/education/books/dbtech}
+	url = {https://www.postgrespro.ru/education/books/dbtech},
         pages = 582,
 }