diff --git a/src/main/java/com/box/library/book/Book.java b/src/main/java/com/box/library/book/Book.java
index 9d2456d..b8ef761 100644
--- a/src/main/java/com/box/library/book/Book.java
+++ b/src/main/java/com/box/library/book/Book.java
@@ -3,15 +3,15 @@
 import com.box.library.author.Author;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import jakarta.persistence.*;
-import lombok.Getter;
-import lombok.NoArgsConstructor;
-import lombok.Setter;
+import lombok.*;
 
 import java.util.List;
 
 @Getter
 @Setter
 @NoArgsConstructor
+@AllArgsConstructor
+@Builder
 @Entity
 @Table(name = "books")
 public class Book {
@@ -34,16 +34,9 @@ public class Book {
     private String publisher;
     private String ISBN;
 
-
+    @Builder.Default
     @Column(nullable = false)
     @Enumerated(EnumType.STRING)
     private BookStatus status = BookStatus.AVAILABLE;
 
-    public Book(String title, List<Author> authors, String publisher, String ISBN) {
-        this.title = title;
-        this.authors = authors;
-        this.publisher = publisher;
-        this.ISBN = ISBN;
-    }
-
 }
diff --git a/src/main/java/com/box/library/book/BookService.java b/src/main/java/com/box/library/book/BookService.java
index 5610b7b..f77c755 100644
--- a/src/main/java/com/box/library/book/BookService.java
+++ b/src/main/java/com/box/library/book/BookService.java
@@ -23,7 +23,14 @@ public BookService(BookRepository repository, AuthorService authorService) {
 
     public Book create(CreateBookRequest request) {
         var authors = authorService.findAllByIds(request.authorsIds());
-        var book = new Book(request.title(), authors, request.publisher(), request.ISBN());
+
+        var book = Book.builder()
+                .title(request.title())
+                .authors(authors)
+                .publisher(request.publisher())
+                .ISBN(request.ISBN())
+                .build();
+
         return repository.save(book);
     }
 
diff --git a/src/main/java/com/box/library/loan/Loan.java b/src/main/java/com/box/library/loan/Loan.java
index 50e6b81..92ea008 100644
--- a/src/main/java/com/box/library/loan/Loan.java
+++ b/src/main/java/com/box/library/loan/Loan.java
@@ -1,10 +1,16 @@
 package com.box.library.loan;
 
 import jakarta.persistence.*;
+import lombok.*;
 
 import java.time.LocalDate;
 import java.util.List;
 
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+@Builder
 @Entity
 @Table(name = "loans")
 public class Loan {
@@ -22,9 +28,7 @@ public class Loan {
     private LocalDate returnDate;
     private LoanStatus status;
 
-    public Loan() {
-    }
-
+    @Builder
     public Loan(Long userId, List<Long> booksIds) {
         this.userId = userId;
         this.booksIds = booksIds;
@@ -33,59 +37,4 @@ public Loan(Long userId, List<Long> booksIds) {
         this.status = LoanStatus.ACTIVE;
     }
 
-    public Long getId() {
-        return id;
-    }
-
-    public void setId(Long id) {
-        this.id = id;
-    }
-
-    public Long getUserId() {
-        return userId;
-    }
-
-    public void setUserId(Long userId) {
-        this.userId = userId;
-    }
-
-    public List<Long> getBooksIds() {
-        return booksIds;
-    }
-
-    public void setBooksIds(List<Long> booksIds) {
-        this.booksIds = booksIds;
-    }
-
-    public LocalDate getLoanDate() {
-        return loanDate;
-    }
-
-    public void setLoanDate(LocalDate loanDate) {
-        this.loanDate = loanDate;
-    }
-
-    public LocalDate getExpectedReturnDate() {
-        return expectedReturnDate;
-    }
-
-    public void setExpectedReturnDate(LocalDate expectedReturnDate) {
-        this.expectedReturnDate = expectedReturnDate;
-    }
-
-    public LocalDate getReturnDate() {
-        return returnDate;
-    }
-
-    public void setReturnDate(LocalDate returnDate) {
-        this.returnDate = returnDate;
-    }
-
-    public LoanStatus getStatus() {
-        return status;
-    }
-
-    public void setStatus(LoanStatus status) {
-        this.status = status;
-    }
 }
diff --git a/src/main/java/com/box/library/user/LibraryUser.java b/src/main/java/com/box/library/user/LibraryUser.java
index bb51ed0..27d939e 100644
--- a/src/main/java/com/box/library/user/LibraryUser.java
+++ b/src/main/java/com/box/library/user/LibraryUser.java
@@ -1,7 +1,12 @@
 package com.box.library.user;
 
 import jakarta.persistence.*;
+import lombok.*;
 
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
 @Entity
 @Table(name = "users")
 public class LibraryUser {
@@ -11,24 +16,5 @@ public class LibraryUser {
     private Long id;
 
     private String username;
-
-    public LibraryUser() {
-    }
-
-    public Long getId() {
-        return id;
-    }
-
-    public void setId(Long id) {
-        this.id = id;
-    }
-
-    public String getUsername() {
-        return username;
-    }
-
-    public void setUsername(String username) {
-        this.username = username;
-    }
 }