# Cal.com v5.2.13 — Release & Upgrade Intelligence
- **Product:** Cal.com (https://cal.com)
- **Version:** v5.2.13
- **Released:** May 08, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/calcom/updates/v5.2.13/

## Executive Summary (TL;DR)
Cal.com v5.2.13. Source highlight: perf: optimize event type query by using team IDs instead of complex join

## New Features
- test: add e2e test for round robin event types
- feat: Add `handleSlotSelect` prop for custom timeslot selection/reservation handling
- feat: enforce log in cal video
- feat: booking references api type filter
- feat: Prerender booking link and reuse with headless router

## Improvements
- perf: optimize event type query by using team IDs instead of complex join

## Bug Fixes
- fix: hiding And connect with specific team members option for non org teams
- fix: unable to change the workflow action
- fix: attendees not visible for hosts in a seated team booking
- fix: don't allow double reserving already reserved slot