# Cal.com v4.0.7 — Release & Upgrade Intelligence
- **Product:** Cal.com (https://cal.com)
- **Version:** v4.0.7
- **Released:** May 07, 2024
- **Impact Score:** 7/10
- **Breaking Changes:** Source flagged
- **Canonical Analysis:** https://changelogs.us/calcom/updates/v4.0.7/

## Executive Summary (TL;DR)
Cal.com v4.0.7. Source highlight: fix: Speed up booking time

## Breaking Changes & Deprecations
- fix: UI breaking in AddActionDialog fixed by @raza001 in https://github.com/calcom/cal.com/pull/14883
- fix: UI breaking in AddActionDialog on reducing browser window height by @utkershrajvenshi in https://github.com/calcom/cal.com/pull/14892

## New Features
- feat: orgs trigger alert when loading a calendar and no availability is found
- feat: Add reschedule information with booking Read
- feat: posthog app added
- feat: "Add an Override" calendar starts with the day specified in general settings
- chore: Add build of API v2 to PR checks
- feat: atoms team booking

## Bug Fixes
- fix: Speed up booking time
- fix: Sender ID info not shown on hover
- fix: flaky webhook e2e test
- fix: UI breaking in AddActionDialog fixed
- fix: Support adding a non-existent email as the owner of the organization
- fix: Booking Cancelled Webhook - Organiser webhook payload is missing id. #14697