diff --git a/apify-api/openapi/components/schemas/datasets/GetDatasetStatisticsResponse.yaml b/apify-api/openapi/components/schemas/datasets/GetDatasetStatisticsResponse.yaml
index 27d09d681..9a5b675ff 100644
--- a/apify-api/openapi/components/schemas/datasets/GetDatasetStatisticsResponse.yaml
+++ b/apify-api/openapi/components/schemas/datasets/GetDatasetStatisticsResponse.yaml
@@ -8,6 +8,7 @@ properties:
     properties:
       fieldStatistics:
         type: object
+        nullable: true
         additionalProperties:
           $ref: ./DatasetFieldStatistics.yaml
         description: 'When you configure the dataset [fields schema](https://docs.apify.com/platform/actors/development/actor-definition/dataset-schema/validation), we measure the statistics such as `min`, `max`, `nullCount` and `emptyCount` for each field.