diff --git a/src/main/java/ru/soune/nocopy/entity/violation/Violation.java b/src/main/java/ru/soune/nocopy/entity/violation/Violation.java
index 2c65045..803b43a 100644
--- a/src/main/java/ru/soune/nocopy/entity/violation/Violation.java
+++ b/src/main/java/ru/soune/nocopy/entity/violation/Violation.java
@@ -21,9 +21,12 @@ public class Violation {
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
 
-    @Column(name = "url", nullable = false, unique = true)
+    @Column(name = "url", nullable = false, columnDefinition = "TEXT")
     private String url;
 
+    @Column(name = "url_hash", unique = true)
+    private String urlHash;
+
     @Column(name = "page_url")
     private String pageUrl;
 
diff --git a/src/main/java/ru/soune/nocopy/repository/ViolationRepository.java b/src/main/java/ru/soune/nocopy/repository/ViolationRepository.java
index b73ec54..ccc6f14 100644
--- a/src/main/java/ru/soune/nocopy/repository/ViolationRepository.java
+++ b/src/main/java/ru/soune/nocopy/repository/ViolationRepository.java
@@ -31,7 +31,7 @@ public interface ViolationRepository extends JpaRepository<Violation, Long> {
     List<Violation> findByFileEntityAndStatusAndCreatedDateBetween(FileEntity file, String status,
                                                                    LocalDateTime startDate, LocalDateTime endDate);
 
-    boolean existsByUrl(String url);
+    boolean existsByUrlHash(String urlHash);
 
     Optional<Violation> findById(Long id);
 
diff --git a/src/main/java/ru/soune/nocopy/service/violation/ViolationService.java b/src/main/java/ru/soune/nocopy/service/violation/ViolationService.java
index 9d8660d..40aa0c4 100644
--- a/src/main/java/ru/soune/nocopy/service/violation/ViolationService.java
+++ b/src/main/java/ru/soune/nocopy/service/violation/ViolationService.java
@@ -1,6 +1,7 @@
 package ru.soune.nocopy.service.violation;
 
 import lombok.AllArgsConstructor;
+import org.apache.commons.codec.digest.DigestUtils;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Pageable;
@@ -27,8 +28,9 @@ public class ViolationService {
     public void processViolation(YandexSearchResponse.ImageResult imageResult, FileEntity file,
                                  GlobalSearchResult result) {
         String url = imageResult.getUrl();
+        String urlHash = DigestUtils.sha256Hex(url);
 
-        if (!violationRepository.existsByUrl(url)) {
+        if (!violationRepository.existsByUrlHash(urlHash)) {
             Violation violation = new Violation();
 
             if (result != null) {
@@ -37,6 +39,7 @@ public class ViolationService {
 
             violation.setHost(imageResult.getHost());
             violation.setUrl(url);
+            violation.setUrlHash(urlHash);
             violation.setPageUrl(imageResult.getPageUrl());
             violation.setPageTitle(imageResult.getPageTitle());
             violation.setFileEntity(file);