diff --git a/search-service-v1/search-service-server-v1/src/main/java/com/iqser/red/service/search/v1/server/model/IndexSection.java b/search-service-v1/search-service-server-v1/src/main/java/com/iqser/red/service/search/v1/server/model/IndexSection.java
index 0b2e53d..51d5aa5 100644
--- a/search-service-v1/search-service-server-v1/src/main/java/com/iqser/red/service/search/v1/server/model/IndexSection.java
+++ b/search-service-v1/search-service-server-v1/src/main/java/com/iqser/red/service/search/v1/server/model/IndexSection.java
@@ -1,7 +1,7 @@
 package com.iqser.red.service.search.v1.server.model;
 
 import java.io.Serializable;
-import java.util.List;
+import java.util.Set;
 
 import lombok.AccessLevel;
 import lombok.AllArgsConstructor;
@@ -18,6 +18,6 @@ public class IndexSection implements Serializable {
 
     private int sectionNumber;
     private String text;
-    private List<Integer> pages;
+    private Set<Integer> pages;
     private String headline;
 }
diff --git a/search-service-v1/search-service-server-v1/src/main/java/com/iqser/red/service/search/v1/server/service/DocumentIndexService.java b/search-service-v1/search-service-server-v1/src/main/java/com/iqser/red/service/search/v1/server/service/DocumentIndexService.java
index 592f289..b98cf0c 100644
--- a/search-service-v1/search-service-server-v1/src/main/java/com/iqser/red/service/search/v1/server/service/DocumentIndexService.java
+++ b/search-service-v1/search-service-server-v1/src/main/java/com/iqser/red/service/search/v1/server/service/DocumentIndexService.java
@@ -76,7 +76,7 @@ public class DocumentIndexService {
         return IndexSection.builder()
                 .sectionNumber(sectionText.getSectionNumber())
                 .text(sectionText.getText())
-                .pages(sectionText.getSectionAreas().stream().map(SectionArea::getPage).collect(Collectors.toList()))
+                .pages(sectionText.getSectionAreas().stream().map(SectionArea::getPage).collect(Collectors.toSet()))
                 .headline(sectionText.getHeadline())
                 .build();
     }