diff --git a/pom.xml b/pom.xml
index d592f91..6bf7629 100644
--- a/pom.xml
+++ b/pom.xml
@@ -69,7 +69,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.4.7</version>
+            <version>1.4.12</version>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
diff --git a/webapp/person.http b/webapp/person.http
index 33be8b7..3ee3f1e 100644
--- a/webapp/person.http
+++ b/webapp/person.http
@@ -10,13 +10,15 @@ Content-Type: application/json
 }
 
 ### User login
+< {%
+    const pwd = request.environment.get("testUserPwd")
+    const userPwd = 'me@koldyr.com:' + pwd;
+    const basicAuthValue = crypto.md5().updateWithText(userPwd).digest().toBase64()
+    request.variables.set("basicAuthValue", basicAuthValue)
+%}
 POST http://{{server}}/api/v1/user/login
-Content-Type: application/json
-
-{
-  "username": "me@koldyr.com",
-  "password": "{{testUserPwd}}"
-}
+Accept: application/json
+Authorization: Basic {{basicAuthValue}}
 
 ### Get All Persons
 GET http://{{server}}/api/v1/lineage/1/persons
diff --git a/webapp/src/main/kotlin/com/koldyr/genealogy/controllers/UserController.kt b/webapp/src/main/kotlin/com/koldyr/genealogy/controllers/UserController.kt
index 015e476..3722c2a 100644
--- a/webapp/src/main/kotlin/com/koldyr/genealogy/controllers/UserController.kt
+++ b/webapp/src/main/kotlin/com/koldyr/genealogy/controllers/UserController.kt
@@ -4,15 +4,16 @@ import java.net.URI
 import io.swagger.v3.oas.annotations.tags.Tag
 import io.swagger.v3.oas.annotations.tags.Tags
 import jakarta.validation.Valid
+import jakarta.validation.constraints.Size
 import org.springframework.http.HttpHeaders.AUTHORIZATION
 import org.springframework.http.ResponseEntity
 import org.springframework.http.ResponseEntity.created
 import org.springframework.http.ResponseEntity.ok
 import org.springframework.web.bind.annotation.PostMapping
 import org.springframework.web.bind.annotation.RequestBody
+import org.springframework.web.bind.annotation.RequestHeader
 import org.springframework.web.bind.annotation.RequestMapping
 import org.springframework.web.bind.annotation.RestController
-import com.koldyr.genealogy.dto.Credentials
 import com.koldyr.genealogy.dto.UserDTO
 import com.koldyr.genealogy.model.User
 import com.koldyr.genealogy.services.UserService
@@ -33,7 +34,7 @@ class UserController(
     }
 
     @PostMapping("/login")
-    fun login(@RequestBody @Valid credentials: Credentials): ResponseEntity<UserDTO> {
+    fun login(@RequestHeader(AUTHORIZATION) @Size(max = 256) credentials: String): ResponseEntity<UserDTO> {
         val user = userService.login(credentials)
 
         return ok()
diff --git a/webapp/src/main/kotlin/com/koldyr/genealogy/services/UserService.kt b/webapp/src/main/kotlin/com/koldyr/genealogy/services/UserService.kt
index f3128f0..f0ad525 100644
--- a/webapp/src/main/kotlin/com/koldyr/genealogy/services/UserService.kt
+++ b/webapp/src/main/kotlin/com/koldyr/genealogy/services/UserService.kt
@@ -1,6 +1,5 @@
 package com.koldyr.genealogy.services
 
-import com.koldyr.genealogy.dto.Credentials
 import com.koldyr.genealogy.dto.LineageUser
 import com.koldyr.genealogy.model.User
 
@@ -13,5 +12,5 @@ import com.koldyr.genealogy.model.User
 interface UserService {
     fun create(user: User)
     fun currentUser(): User
-    fun login(credentials: Credentials): LineageUser
+    fun login(credentials: String): LineageUser
 }
diff --git a/webapp/src/main/kotlin/com/koldyr/genealogy/services/UserServiceImpl.kt b/webapp/src/main/kotlin/com/koldyr/genealogy/services/UserServiceImpl.kt
index b437687..d3b8141 100644
--- a/webapp/src/main/kotlin/com/koldyr/genealogy/services/UserServiceImpl.kt
+++ b/webapp/src/main/kotlin/com/koldyr/genealogy/services/UserServiceImpl.kt
@@ -3,9 +3,17 @@ package com.koldyr.genealogy.services
 import java.time.LocalDateTime
 import java.time.ZoneId
 import java.util.*
+import kotlin.text.Charsets.UTF_8
+import com.nimbusds.jose.JWSAlgorithm
+import com.nimbusds.jose.JWSHeader
+import com.nimbusds.jose.crypto.MACSigner
+import com.nimbusds.jwt.JWTClaimsSet
+import com.nimbusds.jwt.SignedJWT
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.beans.factory.annotation.Value
-import org.springframework.http.HttpStatus.*
+import org.springframework.http.HttpStatus.BAD_REQUEST
+import org.springframework.http.HttpStatus.FORBIDDEN
+import org.springframework.http.HttpStatus.NOT_FOUND
 import org.springframework.security.authentication.AuthenticationManager
 import org.springframework.security.authentication.UsernamePasswordAuthenticationToken.unauthenticated
 import org.springframework.security.core.Authentication
@@ -15,12 +23,6 @@ import org.springframework.security.crypto.password.PasswordEncoder
 import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
 import org.springframework.web.server.ResponseStatusException
-import com.nimbusds.jose.JWSAlgorithm
-import com.nimbusds.jose.JWSHeader
-import com.nimbusds.jose.crypto.MACSigner
-import com.nimbusds.jwt.JWTClaimsSet
-import com.nimbusds.jwt.SignedJWT
-import com.koldyr.genealogy.dto.Credentials
 import com.koldyr.genealogy.dto.LineageUser
 import com.koldyr.genealogy.model.User
 import com.koldyr.genealogy.persistence.RoleRepository
@@ -71,20 +73,34 @@ class UserServiceImpl(
     }
 
     @Transactional(readOnly = true)
-    override fun login(credentials: Credentials): LineageUser {
+    override fun login(credentials: String): LineageUser {
         try {
-            val usernamePassword = unauthenticated(credentials.username, credentials.password)
-            val authentication = authenticationManager.authenticate(usernamePassword)
+            val (userName, password) = getCredentials(credentials)
+            val unauthenticatedToken = unauthenticated(userName, password)
+            val authentication = authenticationManager.authenticate(unauthenticatedToken)
 
             val user = authentication.principal as LineageUser
             user.token = "Bearer " + generateToken(authentication)
             
             return user
+        } catch (e: IllegalArgumentException) {
+            throw ResponseStatusException(BAD_REQUEST, e.message)
         } catch (e: AuthenticationException) {
             throw ResponseStatusException(FORBIDDEN, "username or password invalid")
         }
     }
 
+    private fun getCredentials(credentials: String): Pair<String, String> {
+        if (!credentials.contains("Basic")) {
+            throw IllegalArgumentException("Wrong authentication schema")
+        }
+        var userNamePassword = credentials.substringAfter("Basic ")
+        userNamePassword = String(Base64.getDecoder().decode(userNamePassword), UTF_8)
+        val userName = userNamePassword.substringBefore(":")
+        val password = userNamePassword.substringAfter(":")
+        return Pair(userName, password)
+    }
+
     private fun generateToken(authentication: Authentication): String {
         val tokenLive = LocalDateTime.now().plusMinutes(expiration.toLong())
         val expiration = Date.from(tokenLive.atZone(ZoneId.systemDefault()).toInstant())
diff --git a/webapp/src/main/kotlin/com/koldyr/genealogy/util/GlobalExceptionHandler.kt b/webapp/src/main/kotlin/com/koldyr/genealogy/util/GlobalExceptionHandler.kt
index a042c2f..c6ed8d1 100644
--- a/webapp/src/main/kotlin/com/koldyr/genealogy/util/GlobalExceptionHandler.kt
+++ b/webapp/src/main/kotlin/com/koldyr/genealogy/util/GlobalExceptionHandler.kt
@@ -2,6 +2,9 @@ package com.koldyr.genealogy.util
 
 import java.time.Instant
 import jakarta.persistence.EntityNotFoundException
+import jakarta.servlet.http.HttpServletRequest
+import jakarta.servlet.http.HttpServletResponse
+import jakarta.validation.ConstraintViolationException
 import org.slf4j.Logger
 import org.slf4j.LoggerFactory
 import org.springframework.dao.DataAccessException
@@ -40,7 +43,6 @@ class GlobalExceptionHandler : ResponseEntityExceptionHandler() {
 
     public override fun handleMethodArgumentNotValid(
         ex: MethodArgumentNotValidException, headers: HttpHeaders, status: HttpStatusCode, request: WebRequest): ResponseEntity<Any> {
-        LOGGER.error(ex.message, ex)
 
         val errors = ex.allErrors.map { error ->
             "${error.objectName}.${error.defaultMessage}"
@@ -52,7 +54,6 @@ class GlobalExceptionHandler : ResponseEntityExceptionHandler() {
 
     public override fun handleHandlerMethodValidationException(
         ex: HandlerMethodValidationException, headers: HttpHeaders, status: HttpStatusCode, request: WebRequest): ResponseEntity<Any> {
-        LOGGER.error(ex.message, ex)
 
         val errors = ArrayList<ErrorDetails>()
         for (violation in ex.allValidationResults) {
@@ -67,9 +68,22 @@ class GlobalExceptionHandler : ResponseEntityExceptionHandler() {
         return badRequest().body(model)
     }
 
+    @ExceptionHandler(ConstraintViolationException::class)
+    fun handleConstraintViolationException(ex: ConstraintViolationException, request: HttpServletRequest, response: HttpServletResponse): ResponseEntity<Any> {
+        val errors = ex.constraintViolations.map { error ->
+            error.message
+        }
+
+        response.sendError(BAD_REQUEST.value(), errors.first())
+        
+        val uri = request.requestURI
+        val model = buildModel(BAD_REQUEST, uri, errors)
+        return badRequest().body(model)
+    }
+
     @ExceptionHandler(EntityNotFoundException::class)
-    fun handleEntityExceptions(ex: EntityNotFoundException, request: WebRequest): ResponseEntity<Any> {
-        val uri = (request as ServletWebRequest).request.requestURI
+    fun handleEntityExceptions(ex: EntityNotFoundException, request: HttpServletRequest): ResponseEntity<Any> {
+        val uri = request.requestURI
         val message = ex.message!!
         val model = buildModel(NOT_FOUND, uri, message)
         return ResponseEntity.status(NOT_FOUND).body(model)
@@ -86,7 +100,7 @@ class GlobalExceptionHandler : ResponseEntityExceptionHandler() {
 
     @ExceptionHandler(Throwable::class)
     @ResponseStatus(INTERNAL_SERVER_ERROR)
-    fun handleAllExceptions(ex: Throwable, request: WebRequest): Map<String, Any> {
+    fun handleAllExceptions(ex: Throwable, request: HttpServletRequest): Map<String, Any> {
         LOGGER.error(ex.message, ex)
 
         val message = when (ex) {
@@ -101,7 +115,7 @@ class GlobalExceptionHandler : ResponseEntityExceptionHandler() {
             }
         }
 
-        val uri = (request as ServletWebRequest).request.requestURI
+        val uri = request.requestURI
         val model = buildModel(INTERNAL_SERVER_ERROR, uri, message)
         return model
     }
diff --git a/webapp/src/test/kotlin/com/koldyr/genealogy/controllers/BaseControllerTest.kt b/webapp/src/test/kotlin/com/koldyr/genealogy/controllers/BaseControllerTest.kt
index 7827f68..07e942b 100644
--- a/webapp/src/test/kotlin/com/koldyr/genealogy/controllers/BaseControllerTest.kt
+++ b/webapp/src/test/kotlin/com/koldyr/genealogy/controllers/BaseControllerTest.kt
@@ -2,6 +2,7 @@ package com.koldyr.genealogy.controllers
 
 import java.lang.Long.parseLong
 import java.time.LocalDate
+import kotlin.text.Charsets.UTF_8
 import com.fasterxml.jackson.databind.ObjectMapper
 import org.apache.commons.lang3.RandomStringUtils.randomAlphabetic
 import org.hamcrest.Matchers.matchesRegex
@@ -160,9 +161,10 @@ abstract class BaseControllerTest {
 
     protected fun login(credentials: Credentials): String {
         return mockMvc.post("/api/v1/user/login") {
-            content = mapper.writeValueAsString(credentials)
-            contentType = APPLICATION_JSON
             accept = APPLICATION_JSON
+            headers {
+                setBasicAuth(credentials.username, credentials.password, UTF_8)
+            }
         }
             .andExpect {
                 status { isOk() }
diff --git a/webapp/src/test/kotlin/com/koldyr/genealogy/controllers/UserControllerTest.kt b/webapp/src/test/kotlin/com/koldyr/genealogy/controllers/UserControllerTest.kt
index f31ecb5..3536479 100644
--- a/webapp/src/test/kotlin/com/koldyr/genealogy/controllers/UserControllerTest.kt
+++ b/webapp/src/test/kotlin/com/koldyr/genealogy/controllers/UserControllerTest.kt
@@ -1,5 +1,6 @@
 package com.koldyr.genealogy.controllers
 
+import org.apache.commons.lang3.RandomStringUtils
 import org.hamcrest.CoreMatchers.`is`
 import org.hamcrest.Matchers.containsString
 import org.junit.Test
@@ -56,15 +57,14 @@ class UserControllerTest : BaseControllerTest() {
 
     @Test
     fun wrongPassword() {
-        val credentials = Credentials().apply {
-            username = "me@koldyr.com"
-            password = "1112"
-        }
+        val username = "me@koldyr.com"
+        var password = "1112"
 
         mockMvc.post("/api/v1/user/login") {
-            content = mapper.writeValueAsString(credentials)
-            contentType = APPLICATION_JSON
             accept = APPLICATION_JSON
+            headers {
+                setBasicAuth(username, password, Charsets.UTF_8)
+            }
         }
 //            .andDo { print() }
             .andExpect {
@@ -73,19 +73,34 @@ class UserControllerTest : BaseControllerTest() {
                     reason("username or password invalid")
                 }
             }
+
+        password = RandomStringUtils.randomAlphabetic(260)
+
+        mockMvc.post("/api/v1/user/login") {
+            accept = APPLICATION_JSON
+            headers {
+                setBasicAuth(username, password, Charsets.UTF_8)
+            }
+        }
+//            .andDo { print() }
+            .andExpect {
+                status {
+                    isBadRequest()
+                    reason("size must be between 0 and 256")
+                }
+            }
     }
 
     @Test
     fun wrongUser() {
-        val credentials = Credentials().apply {
-            username = "you@koldyr.com"
-            password = "koldyr"
-        }
+        val username = "you@koldyr.com"
+        val password = testPassword
 
         mockMvc.post("/api/v1/user/login") {
-            content = mapper.writeValueAsString(credentials)
-            contentType = APPLICATION_JSON
             accept = APPLICATION_JSON
+            headers {
+                setBasicAuth(username, password, Charsets.UTF_8)
+            }
         }
 //            .andDo { print() }
             .andExpect {