diff --git a/src/main/java/ru/nsu/fit/directors/userservice/model/Company.java b/src/main/java/ru/nsu/fit/directors/userservice/model/Company.java
index 61e066b..53c74b2 100644
--- a/src/main/java/ru/nsu/fit/directors/userservice/model/Company.java
+++ b/src/main/java/ru/nsu/fit/directors/userservice/model/Company.java
@@ -6,6 +6,9 @@
 import lombok.Getter;
 import lombok.Setter;
 import lombok.experimental.Accessors;
+import org.hibernate.proxy.HibernateProxy;
+
+import java.util.Objects;
 
 @Entity
 @Table(name = "company")
@@ -16,4 +19,19 @@ public class Company {
     @Id
     private Long id;
 
+    @Override
+    public final boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null) return false;
+        Class<?> oEffectiveClass = o instanceof HibernateProxy ? ((HibernateProxy) o).getHibernateLazyInitializer().getPersistentClass() : o.getClass();
+        Class<?> thisEffectiveClass = this instanceof HibernateProxy ? ((HibernateProxy) this).getHibernateLazyInitializer().getPersistentClass() : this.getClass();
+        if (thisEffectiveClass != oEffectiveClass) return false;
+        Company company = (Company) o;
+        return getId() != null && Objects.equals(getId(), company.getId());
+    }
+
+    @Override
+    public final int hashCode() {
+        return this instanceof HibernateProxy ? ((HibernateProxy) this).getHibernateLazyInitializer().getPersistentClass().hashCode() : getClass().hashCode();
+    }
 }
diff --git a/src/main/java/ru/nsu/fit/directors/userservice/model/User.java b/src/main/java/ru/nsu/fit/directors/userservice/model/User.java
index 7ec2cd8..42f427b 100644
--- a/src/main/java/ru/nsu/fit/directors/userservice/model/User.java
+++ b/src/main/java/ru/nsu/fit/directors/userservice/model/User.java
@@ -1,5 +1,6 @@
 package ru.nsu.fit.directors.userservice.model;
 
+import jakarta.persistence.CascadeType;
 import jakarta.persistence.Entity;
 import jakarta.persistence.FetchType;
 import jakarta.persistence.GeneratedValue;
@@ -36,7 +37,7 @@ public class User implements UserDetails {
     private String phoneNumber;
     private String password;
     private Long vkUserId;
-    @ManyToMany(fetch = FetchType.EAGER)
+    @ManyToMany(fetch = FetchType.EAGER, cascade = {CascadeType.PERSIST, CascadeType.REFRESH, CascadeType.MERGE})
     @JoinTable(
         name = "favourite_companies",
         joinColumns = @JoinColumn(name = "user_id"),
diff --git a/src/main/java/ru/nsu/fit/directors/userservice/repository/CompanyService.java b/src/main/java/ru/nsu/fit/directors/userservice/repository/CompanyService.java
index 47eca13..42c169a 100644
--- a/src/main/java/ru/nsu/fit/directors/userservice/repository/CompanyService.java
+++ b/src/main/java/ru/nsu/fit/directors/userservice/repository/CompanyService.java
@@ -7,7 +7,6 @@
 import ru.nsu.fit.directors.userservice.model.Company;
 
 import java.util.List;
-import java.util.stream.Stream;
 
 @Component
 @RequiredArgsConstructor
@@ -22,7 +21,7 @@ public Company getCompanyById(Long establishmentId) {
         );
     }
 
-    public List<Company> getCompaniesByIds(Stream<Long> ids) {
+    public List<Company> getCompaniesByIds(List<Long> ids) {
         return establishmentApi.syncListGetWithParams(
             uriBuilder -> uriBuilder.path("/internal/establishment").queryParam("ids", ids).build(),
             new ParameterizedTypeReference<>() {}
diff --git a/src/main/java/ru/nsu/fit/directors/userservice/service/FavouritesServiceImpl.java b/src/main/java/ru/nsu/fit/directors/userservice/service/FavouritesServiceImpl.java
index 6f71ed5..cd4198b 100644
--- a/src/main/java/ru/nsu/fit/directors/userservice/service/FavouritesServiceImpl.java
+++ b/src/main/java/ru/nsu/fit/directors/userservice/service/FavouritesServiceImpl.java
@@ -35,7 +35,7 @@ public void addToFavourites(Long establishmentId) {
     @Transactional
     public void deleteFromFavourites(Long establishmentId) {
         User loggedUser = securityService.getLoggedInUser();
-        loggedUser.getFavourites().remove(new Company().setId(establishmentId));
+        loggedUser.getFavourites().remove(companyRepository.findById(establishmentId).orElseThrow());
         userRepository.save(loggedUser);
     }
 
@@ -43,6 +43,6 @@ public void deleteFromFavourites(Long establishmentId) {
     @Transactional
     public List<Company> getFavourites() {
         User loggedUser = securityService.getLoggedInUser();
-        return companyService.getCompaniesByIds(loggedUser.getFavourites().stream().map(Company::getId));
+        return companyService.getCompaniesByIds(loggedUser.getFavourites().stream().map(Company::getId).toList());
     }
 }