diff --git a/build.gradle.kts b/build.gradle.kts
index 70e5b08..aaf8e58 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -21,7 +21,7 @@ repositories {
 val exposedVersion = "0.41.1"
 val postgresVersion = "42.5.4"
 val telegramBotVersion = "6.5.0"
-val springBootVersion = "3.1.0"
+val springBootVersion = "2.7.14"
 val serializationVersion = "1.5.0"
 val loggingVersion = "3.0.5"
 val securityTestVersion = "6.0.2"
@@ -34,16 +34,9 @@ dependencies {
     implementation("org.telegram:telegrambotsextensions:$telegramBotVersion")
     implementation("org.telegram:telegrambots-spring-boot-starter:$telegramBotVersion")
 
-    implementation("org.springframework.boot:spring-boot-starter:$springBootVersion") {
-        exclude("org.springframework.boot:spring-boot-starter-tomcat")
-    }
-    implementation("org.springframework.boot:spring-boot-starter-web:$springBootVersion") {
-        exclude("org.springframework.boot:spring-boot-starter-tomcat")
-    }
-    implementation("org.springframework.boot:spring-boot-starter-security:$springBootVersion") {
-        exclude("org.springframework.boot:spring-boot-starter-tomcat")
-    }
-    implementation("org.springframework.boot:spring-boot-starter-jetty:$springBootVersion")
+    implementation("org.springframework.boot:spring-boot-starter:$springBootVersion")
+    implementation("org.springframework.boot:spring-boot-starter-web:$springBootVersion")
+    implementation("org.springframework.boot:spring-boot-starter-security:$springBootVersion")
     implementation("com.fasterxml.jackson.module:jackson-module-kotlin:$jacksonVersion")
 
     implementation("org.jetbrains.kotlin:kotlin-reflect")
@@ -58,16 +51,6 @@ dependencies {
     testImplementation("org.springframework.boot:spring-boot-starter-test:$springBootVersion")
 }
 
-configurations.all {
-    resolutionStrategy {
-        eachDependency {
-            if (requested.group == "jakarta.servlet") {
-                useVersion("5.0.0")
-            }
-        }
-    }
-}
-
 tasks.withType<KotlinCompile> {
     kotlinOptions {
         freeCompilerArgs = listOf("-Xjsr305=strict")
diff --git a/src/main/kotlin/ru/sicamp/sicamphelper/api/controller/UsersController.kt b/src/main/kotlin/ru/sicamp/sicamphelper/api/controller/UsersController.kt
index 8cc388b..f77cb24 100644
--- a/src/main/kotlin/ru/sicamp/sicamphelper/api/controller/UsersController.kt
+++ b/src/main/kotlin/ru/sicamp/sicamphelper/api/controller/UsersController.kt
@@ -1,7 +1,5 @@
 package ru.sicamp.sicamphelper.api.controller
 
-import com.fasterxml.jackson.databind.ObjectMapper
-import com.fasterxml.jackson.module.kotlin.convertValue
 import mu.KLogging
 import org.springframework.web.bind.annotation.*
 import ru.sicamp.sicamphelper.model.dto.UserDto
@@ -11,7 +9,6 @@ import ru.sicamp.sicamphelper.service.UserService
 @RestController
 class UsersController(
     private val userService: UserService,
-    private val objectMapper: ObjectMapper,
 ) {
     @PostMapping("/user/create")
     fun create(@RequestParam dto: UserDto): UserInfo {
diff --git a/src/main/kotlin/ru/sicamp/sicamphelper/repository/UserRepository.kt b/src/main/kotlin/ru/sicamp/sicamphelper/repository/UserRepository.kt
index 60993b6..faa4f66 100644
--- a/src/main/kotlin/ru/sicamp/sicamphelper/repository/UserRepository.kt
+++ b/src/main/kotlin/ru/sicamp/sicamphelper/repository/UserRepository.kt
@@ -1,15 +1,16 @@
 package ru.sicamp.sicamphelper.repository
 
 import mu.KLogging
+import org.jetbrains.exposed.dao.load
 import org.jetbrains.exposed.dao.with
 import org.jetbrains.exposed.sql.and
 import org.jetbrains.exposed.sql.transactions.transaction
+import org.springframework.security.core.userdetails.UsernameNotFoundException
 import org.springframework.security.crypto.password.PasswordEncoder
 import org.springframework.stereotype.Repository
 import ru.sicamp.sicamphelper.db.entity.User
 import ru.sicamp.sicamphelper.db.table.Users
 import ru.sicamp.sicamphelper.model.dto.UserDto
-import ru.sicamp.sicamphelper.util.badArgument
 import java.time.Duration
 import java.time.LocalDateTime
 
@@ -21,7 +22,10 @@ class UserRepository(
         User.find {
             (Users.tgId eq id) and
                     (Users.tgUsername eq userName)
-        }.firstOrNull()
+        }.with(
+            User::supervisor,
+            User::group
+        ).firstOrNull()
     }
 
     fun findUserByUsername(username: String) = transaction {
@@ -30,11 +34,14 @@ class UserRepository(
         }.with(
             User::supervisor,
             User::group
-        ).firstOrNull() ?: badArgument("Not found user with username $username")
+        ).firstOrNull() ?: throw UsernameNotFoundException("Not found user with username $username")
     }
 
     fun findUserById(id: Long) = transaction {
-        User.findById(id)
+        User.findById(id)?.load(
+            User::supervisor,
+            User::group
+        )
     }
 
     fun createUser(userDto: UserDto): User = transaction {
diff --git a/src/main/kotlin/ru/sicamp/sicamphelper/security/UserDetailsServiceImpl.kt b/src/main/kotlin/ru/sicamp/sicamphelper/security/UserDetailsServiceImpl.kt
new file mode 100644
index 0000000..4760a12
--- /dev/null
+++ b/src/main/kotlin/ru/sicamp/sicamphelper/security/UserDetailsServiceImpl.kt
@@ -0,0 +1,16 @@
+package ru.sicamp.sicamphelper.security
+
+import org.springframework.security.core.userdetails.UserDetailsService
+import org.springframework.stereotype.Service
+import ru.sicamp.sicamphelper.db.entity.User
+import ru.sicamp.sicamphelper.repository.UserRepository
+import ru.sicamp.sicamphelper.util.badArgument
+
+@Service
+class UserDetailsServiceImpl(
+    private val userRepository: UserRepository
+) : UserDetailsService {
+    override fun loadUserByUsername(username: String?): User = userRepository.findUserByUsername(
+        username = username ?: badArgument("Username shouldn't be null")
+    )
+}
diff --git a/src/main/kotlin/ru/sicamp/sicamphelper/service/UserService.kt b/src/main/kotlin/ru/sicamp/sicamphelper/service/UserService.kt
index 8e14da2..21d17bf 100644
--- a/src/main/kotlin/ru/sicamp/sicamphelper/service/UserService.kt
+++ b/src/main/kotlin/ru/sicamp/sicamphelper/service/UserService.kt
@@ -1,6 +1,5 @@
 package ru.sicamp.sicamphelper.service
 
-import org.springframework.security.core.userdetails.UserDetailsService
 import org.springframework.stereotype.Service
 import ru.sicamp.sicamphelper.db.entity.User
 import ru.sicamp.sicamphelper.model.dto.UserDto
@@ -12,16 +11,12 @@ import ru.sicamp.sicamphelper.util.badArgument
 @Service
 class UserService(
     private val userRepository: UserRepository
-) : UserDetailsService {
+) {
     fun findUserByTgUser(user: TgUser): User? = userRepository.findUserByTgUsernameAndId(
         id = user.id,
         userName = user.userName
     )
 
-    override fun loadUserByUsername(username: String?): User = userRepository.findUserByUsername(
-        username = username ?: badArgument("Username shouldn't be null")
-    )
-
     fun findUserInfoByLogin(login: String) = UserInfo.from(
         userRepository.findUserByUsername(login)
     ) ?: badArgument("Not found user with login=$login")