diff --git a/apps/api/src/dkv/dto/dkv-history.dto.ts b/apps/api/src/dkv/dto/dkv-history.dto.ts
index d441f93..a693c7c 100644
--- a/apps/api/src/dkv/dto/dkv-history.dto.ts
+++ b/apps/api/src/dkv/dto/dkv-history.dto.ts
@@ -1,4 +1,5 @@
-import { IsInt, IsOptional, Min } from 'class-validator';
+import { Type } from 'class-transformer';
+import { IsInt, IsOptional, Max, Min } from 'class-validator';
 
 /**
  * Query DTO for paginating the DKV invoice processing history.
@@ -13,18 +14,25 @@ export class DkvHistoryQueryDto {
   /**
    * Page number (1-based). Defaults to 1 when omitted.
    * T-07-06: bounded integer prevents negative-page or non-integer injection.
+   * @Type(() => Number) coerces the query-string string to a number before
+   * validation — required because HTTP query params always arrive as strings.
    */
   @IsOptional()
   @IsInt()
   @Min(1)
+  @Type(() => Number)
   page?: number;
 
   /**
    * Number of records per page. Defaults to 20 when omitted.
    * T-07-06: bounded integer mitigates oversized result-set DoS.
+   * @Type(() => Number) coerces the query-string string to a number before
+   * validation — required because HTTP query params always arrive as strings.
    */
   @IsOptional()
   @IsInt()
   @Min(1)
+  @Max(100)
+  @Type(() => Number)
   limit?: number;
 }