diff --git a/CHANGELOG.md b/CHANGELOG.md
index a350a90c..64e29ca0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,9 @@ The file format of it is based on [Keep a Changelog](http://keepachangelog.com/e
 For public Changelog covering all changes done to Pipedrive’s API, webhooks and app extensions platforms, see [public Changelog](https://pipedrive.readme.io/docs/changelog) with discussion area in [Developers Community](https://devcommunity.pipedrive.com/c/documentation/changelog/19).
 
 ## [Unreleased]
+### Fixed
+- Fixed the comma-separated `include_fields` query parameter across v2 collection/detail endpoints (`GET /api/v2/activities`, `GET /api/v2/activities/{id}`, `GET /api/v2/activityFields`, `GET /api/v2/activityFields/{field_code}`, `GET /api/v2/deals`, `GET /api/v2/deals/{id}`, `GET /api/v2/dealFields`, `GET /api/v2/dealFields/{field_code}`, `GET /api/v2/organizations`, `GET /api/v2/organizations/{id}`, `GET /api/v2/organizationFields`, `GET /api/v2/organizationFields/{field_code}`, `GET /api/v2/persons`, `GET /api/v2/persons/{id}`, `GET /api/v2/personFields`, `GET /api/v2/personFields/{field_code}`, `GET /api/v2/productFields`, and `GET /api/v2/productFields/{field_code}`) that was typed as `type: string` with an enum of comma-joined value combinations despite accepting comma-separated lists — changed to `type: array` of enumerated strings with `uniqueItems: true`, `style: form`, `explode: false`
+- Fixed the comma-separated `custom_fields` query parameter on v2 collection/detail endpoints (`GET /api/v2/deals`, `GET /api/v2/deals/archived`, `GET /api/v2/deals/{id}`, `GET /api/v2/organizations`, `GET /api/v2/organizations/{id}`, `GET /api/v2/persons`, `GET /api/v2/persons/{id}`, and `GET /api/v2/products`) and the `ids` query parameter on v2 collection endpoints (`GET /api/v2/activities`, `GET /api/v2/deals`, `GET /api/v2/deals/archived`, `GET /api/v2/organizations`, `GET /api/v2/persons`, and `GET /api/v2/products`) that were typed as `type: string` despite accepting comma-separated lists — changed to `type: array` of strings (`custom_fields` capped at 15 items, `ids` at 100) with `uniqueItems: true`, `style: form`, `explode: false`
 
 ## [34.0.0] - 2026-10-09
 ### Fixed