# Cal.com v5.5.16 — Release & Upgrade Intelligence
- **Product:** Cal.com (https://cal.com)
- **Version:** v5.5.16
- **Released:** Aug 12, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/calcom/updates/v5.5.16/

## Executive Summary (TL;DR)
Cal.com v5.5.16. Source highlight: refactor: convert findQualifiedHostsWithDelegationCredentials to service class with DI by @devin-ai-integration[bot] in https://github.com/calcom/cal.com/pull/22974

## New Features
- feat: atoms e2e tests
- feat: add conditional todesktop class to html element
- feat: more atoms styles
- chore: Add `jackson` and `jose` to next config `serverExternalPackages`

## Bug Fixes
- fix: resolve credential mismatch in round robin reschedule causing 404 errors
- fix: ensure seated event reschedules send proper reschedule emails
- fix: false 500s from `/api/book/event`
- fix: Org Redirect in SINGLE ORG Mode
- fix: unauthorized trpc error in /getting-started page
- fix: atoms e2e env variables to turbo.json