diff --git a/backend/src/main/java/reviewme/highlight/domain/Highlight.java b/backend/src/main/java/reviewme/highlight/domain/Highlight.java
index ba2a85ce5..de6714efa 100644
--- a/backend/src/main/java/reviewme/highlight/domain/Highlight.java
+++ b/backend/src/main/java/reviewme/highlight/domain/Highlight.java
@@ -29,7 +29,7 @@ public class Highlight {
     @Embedded
     private HighlightPosition highlightPosition;
 
-    public Highlight(long answerId, long lineIndex, long startIndex, long endIndex) {
+    public Highlight(long answerId, int lineIndex, int startIndex, int endIndex) {
         this.answerId = answerId;
         this.highlightPosition = new HighlightPosition(lineIndex, startIndex, endIndex);
     }
diff --git a/backend/src/main/java/reviewme/highlight/domain/HighlightPosition.java b/backend/src/main/java/reviewme/highlight/domain/HighlightPosition.java
index cd03bb5b7..25463cd51 100644
--- a/backend/src/main/java/reviewme/highlight/domain/HighlightPosition.java
+++ b/backend/src/main/java/reviewme/highlight/domain/HighlightPosition.java
@@ -16,15 +16,15 @@
 public class HighlightPosition {
 
     @Column(name = "line_index", nullable = false)
-    private long lineIndex;
+    private int lineIndex;
 
     @Column(name = "start_index", nullable = false)
-    private long startIndex;
+    private int startIndex;
 
     @Column(name = "end_index", nullable = false)
-    private long endIndex;
+    private int endIndex;
 
-    public HighlightPosition(long lineIndex, long startIndex, long endIndex) {
+    public HighlightPosition(int lineIndex, int startIndex, int endIndex) {
         validateNonNegativeIndexNumber(startIndex, endIndex);
         validateEndIndexOverStartIndex(startIndex, endIndex);
         this.lineIndex = lineIndex;
diff --git a/backend/src/main/java/reviewme/highlight/service/dto/HighlightIndexRangeRequest.java b/backend/src/main/java/reviewme/highlight/service/dto/HighlightIndexRangeRequest.java
index fde581308..42b7394e4 100644
--- a/backend/src/main/java/reviewme/highlight/service/dto/HighlightIndexRangeRequest.java
+++ b/backend/src/main/java/reviewme/highlight/service/dto/HighlightIndexRangeRequest.java
@@ -5,9 +5,9 @@
 public record HighlightIndexRangeRequest(
 
         @NotNull(message = "시작 인덱스를 입력해주세요.")
-        Long startIndex,
+        Integer startIndex,
 
         @NotNull(message = "끝 인덱스를 입력해주세요.")
-        Long endIndex
+        Integer endIndex
 ) {
 }
diff --git a/backend/src/main/java/reviewme/highlight/service/dto/HighlightedLineRequest.java b/backend/src/main/java/reviewme/highlight/service/dto/HighlightedLineRequest.java
index a8275aea3..9188f3bc9 100644
--- a/backend/src/main/java/reviewme/highlight/service/dto/HighlightedLineRequest.java
+++ b/backend/src/main/java/reviewme/highlight/service/dto/HighlightedLineRequest.java
@@ -8,7 +8,7 @@
 public record HighlightedLineRequest(
 
         @NotNull(message = "인덱스를 입력해주세요.")
-        Long index,
+        Integer index,
 
         @Valid @NotEmpty(message = "하이라이트 범위를 입력해주세요.")
         List<HighlightIndexRangeRequest> ranges
diff --git a/backend/src/test/java/reviewme/highlight/service/HighlightServiceTest.java b/backend/src/test/java/reviewme/highlight/service/HighlightServiceTest.java
index d02a9909f..0128b9d3e 100644
--- a/backend/src/test/java/reviewme/highlight/service/HighlightServiceTest.java
+++ b/backend/src/test/java/reviewme/highlight/service/HighlightServiceTest.java
@@ -66,8 +66,8 @@ class HighlightServiceTest {
         TextAnswer textAnswer2 = new TextAnswer(questionId, "text answer2");
         Review review = reviewRepository.save(new Review(templateId, reviewGroupId, List.of(textAnswer1, textAnswer2)));
 
-        HighlightIndexRangeRequest indexRangeRequest = new HighlightIndexRangeRequest(1L, 1L);
-        HighlightedLineRequest lineRequest = new HighlightedLineRequest(0L, List.of(indexRangeRequest));
+        HighlightIndexRangeRequest indexRangeRequest = new HighlightIndexRangeRequest(1, 1);
+        HighlightedLineRequest lineRequest = new HighlightedLineRequest(0, List.of(indexRangeRequest));
         HighlightRequest highlightRequest1 = new HighlightRequest(textAnswer1.getId(), List.of(lineRequest));
         HighlightRequest highlightRequest2 = new HighlightRequest(textAnswer2.getId(), List.of(lineRequest));
         HighlightsRequest highlightsRequest = new HighlightsRequest(
@@ -99,9 +99,9 @@ class HighlightServiceTest {
         TextAnswer textAnswer2 = new TextAnswer(questionId, "text answer2");
         Review review = reviewRepository.save(new Review(templateId, reviewGroupId, List.of(textAnswer1, textAnswer2)));
 
-        long startIndex = 2L;
-        long endIndex = 2L;
-        long lineIndex = 0;
+        int startIndex = 2;
+        int endIndex = 2;
+        int lineIndex = 0;
         HighlightIndexRangeRequest indexRangeRequest = new HighlightIndexRangeRequest(startIndex, endIndex);
         HighlightedLineRequest lineRequest1 = new HighlightedLineRequest(lineIndex, List.of(indexRangeRequest));
         HighlightedLineRequest lineRequest2 = new HighlightedLineRequest(lineIndex, List.of(indexRangeRequest));
diff --git a/backend/src/test/java/reviewme/highlight/service/validator/HighlightValidatorTest.java b/backend/src/test/java/reviewme/highlight/service/validator/HighlightValidatorTest.java
index 10fddba5f..21f1f8638 100644
--- a/backend/src/test/java/reviewme/highlight/service/validator/HighlightValidatorTest.java
+++ b/backend/src/test/java/reviewme/highlight/service/validator/HighlightValidatorTest.java
@@ -116,7 +116,7 @@ class HighlightValidatorTest {
         Review review = reviewRepository.save(new Review(templateId, reviewGroupId, List.of(textAnswer)));
 
         long answerLineCount = textAnswer.getContent().lines().count();
-        HighlightedLineRequest highlightedLineRequest = new HighlightedLineRequest(answerLineCount, List.of());
+        HighlightedLineRequest highlightedLineRequest = new HighlightedLineRequest((int) answerLineCount, List.of());
         HighlightRequest highlightRequest = new HighlightRequest(textAnswer.getId(), List.of(highlightedLineRequest));
         HighlightsRequest highlightsRequest = new HighlightsRequest(questionId, List.of(highlightRequest));