diff --git a/src/main/java/eu/ztsh/wymiana/service/UserService.java b/src/main/java/eu/ztsh/wymiana/service/UserService.java
index f9e7cde..0bb7945 100644
--- a/src/main/java/eu/ztsh/wymiana/service/UserService.java
+++ b/src/main/java/eu/ztsh/wymiana/service/UserService.java
@@ -7,6 +7,7 @@ import eu.ztsh.wymiana.util.UserMapper;
 import eu.ztsh.wymiana.validation.InstanceValidator;
 import eu.ztsh.wymiana.web.model.UserCreateRequest;
 import lombok.RequiredArgsConstructor;
+import org.hibernate.validator.constraints.pl.PESEL;
 import org.springframework.stereotype.Service;
 
 import java.util.Optional;
@@ -26,7 +27,7 @@ public class UserService {
         return UserMapper.entityToPojo(userRepository.save(UserMapper.requestToEntity(request)));
     }
 
-    public Optional<User> get(String pesel) {
+    public Optional<User> get(@PESEL String pesel) {
         return userRepository.findById(pesel).map(UserMapper::entityToPojo);
     }