diff --git a/src/history/dto/history-response.dto.ts b/src/history/dto/history-response.dto.ts
index a28cc2c..83c6d0f 100644
--- a/src/history/dto/history-response.dto.ts
+++ b/src/history/dto/history-response.dto.ts
@@ -1,22 +1,11 @@
 export type HistoryPointDto = {
-  t: number;
-  min: number;
-  avg: number;
-  max: number;
-  count: number;
-};
-
-export type HistorySeriesDto = {
-  edge: string;
-  tag: string;
-  points: HistoryPointDto[];
+  time: Date;
+  min_value: number;
+  avg_value: number;
+  max_value: number;
+  point_count: number;
 };
 
 export type HistoryResponseDto = {
-  edge: string;
-  tag: string;
-  from: Date;
-  to: Date;
-  granulate: string;
-  series: HistorySeriesDto[];
+  rows: HistoryPointDto[];
 };
diff --git a/src/history/history.mapper.ts b/src/history/history.mapper.ts
deleted file mode 100644
index c481fab..0000000
--- a/src/history/history.mapper.ts
+++ /dev/null
@@ -1,41 +0,0 @@
-import { HistoryResponseDto, HistorySeriesDto } from './dto/history-response.dto';
-import { HistoryRow } from './history.types';
-
-type HistoryResponseOptions = {
-  edge: string;
-  tag: string;
-  from: Date;
-  to: Date;
-  granulate: string;
-  rows: HistoryRow[];
-};
-
-/** Переводит строки агрегированной истории в формат графика min/avg/max. */
-export function createHistoryResponse(options: HistoryResponseOptions): HistoryResponseDto {
-  return {
-    edge: options.edge,
-    tag: options.tag,
-    from: options.from,
-    to: options.to,
-    granulate: options.granulate,
-    series: options.rows.length
-      ? [
-          {
-            edge: options.edge,
-            tag: options.tag,
-            points: mapHistoryRowsToPoints(options.rows),
-          },
-        ]
-      : [],
-  };
-}
-
-function mapHistoryRowsToPoints(rows: HistoryRow[]): HistorySeriesDto['points'] {
-  return rows.map((row) => ({
-    t: row.time.getTime(),
-    min: row.min_value,
-    avg: row.avg_value,
-    max: row.max_value,
-    count: row.point_count,
-  }));
-}
diff --git a/src/history/history.service.ts b/src/history/history.service.ts
index 8e80f85..a1c7719 100644
--- a/src/history/history.service.ts
+++ b/src/history/history.service.ts
@@ -1,7 +1,6 @@
 import { BadRequestException, Injectable } from '@nestjs/common';
 import { GetHistoryDto } from './dto/get-history.dto';
 import { HistoryResponseDto } from './dto/history-response.dto';
-import { createHistoryResponse } from './history.mapper';
 import { HistoryRepository } from './history.repository';
 
 @Injectable()
@@ -21,21 +20,7 @@ export class HistoryService {
       throw new BadRequestException('from cannot be greater than to.');
     }
 
-    const rows = await this.repository.findBucketedRange(
-      query.edge,
-      query.tag,
-      from,
-      to,
-      query.granulate,
-    );
-
-    return createHistoryResponse({
-      edge: query.edge,
-      tag: query.tag,
-      from,
-      to,
-      granulate: query.granulate,
-      rows,
-    });
+    const rows = await this.repository.findBucketedRange(query.edge, query.tag, from, to, query.granulate);
+    return { rows };
   }
 }