diff --git a/Database.cs b/Database.cs
index 137d957..81e11dc 100644
--- a/Database.cs
+++ b/Database.cs
@@ -21,7 +21,8 @@ namespace Database
 				CREATE TABLE [Authors] (
 				    [ID] INTEGER PRIMARY KEY AUTOINCREMENT,
 				    [Name] TEXT,
-				    [Surname] TEXT
+				    [Surname] TEXT,
+				    [DateOfBirth] DATE,  
 				);
 				CREATE TABLE [Publisher] (
 				    [ID] INTEGER PRIMARY KEY AUTOINCREMENT,
@@ -30,8 +31,8 @@ namespace Database
 				);
 				CREATE TABLE [Borrows] (
 				    [ID] INTEGER PRIMARY KEY AUTOINCREMENT,
-				    [DateOfBorrow] TEXT,
-				    [DateOfReturn] TEXT,
+				    [DateOfBorrow] DATE,
+				    [DateOfReturn] DATE,
 				    [UserID] INTEGER,
 				    [BookID] INTEGER,
 				    FOREIGN KEY ([UserID]) REFERENCES [Users]([ID]),