# Healthchecks changelog

> A cron-job monitoring service that alerts you when your scheduled tasks go silent.

- Vendor: Pēteris Caune
- Category: Developer Tools
- Official site: https://healthchecks.io
- Tracked by: What's New (https://whatsnew.fyi/product/healthchecks)
- Harvested from: GitHub (healthchecks/healthchecks)
- Entries below: 10 (newest first)

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

## Releases

### v4.3

- Date: 2026-07-14
- Version: v4.3
- Original notes: https://github.com/healthchecks/healthchecks/releases/tag/v4.3
- Permalink: https://whatsnew.fyi/product/healthchecks/releases/v4.3

- **changed** — Send "Monthly Phone/SMS/WA Limit Reached" notice to all team members instead of just owner
- **changed** — Include notification text in the "Monthly Phone/SMS/WA Limit Reached" notice
- **added** — Add a note about unset ping key in the check details page
- **added** — Let users specify alert priorities in the "Add Gotify" form
- **added** — Add ability to edit existing Gotify integrations
- **changed** — Switch from Selectize to Tom Select for dropdown controls
- **added** — Implement Markdown formatting in Ntfy notifications
- **changed** — Update alert templates to report downtime duration
- **changed** — Switch to Argon2 as the default hasher for passwords and login tokens
- **changed** — Optimize DB queries for team membership lookups and for the "Get Pings" API call
- **fixed** — Fix WebhookValidator to handle input that contains square brackets
- **fixed** — Update Check.rename_and_delete() to better handle race conditions
- **fixed** — Enforce check limit (times two) when pinging by slug
- **fixed** — Fix the "Edit Ntfy" form to preserve selected priorities when the form reloads
- **fixed** — Fix the parsing of inbound emails with UTF8 body
- **added** — Add rate-limiting by email in the /accounts/signup view

###### Improvements
- Send "Monthly Phone/SMS/WA Limit Reached" notice to all team members (not just owner)
- Include notification text in the "Monthly Phone/SMS/WA Limit Reached" notice
- Add a note about unset ping key in the check details page (#1295)
- In the "Add Gotify" form, let users specify alert priorities (#990, @BeyondMagic)
- Add ability to edit existing Gotify integrations
- Switch from Selectize to Tom Select for dropdown controls
- Implement Markdown formatting in Ntfy notifications
- Update alert templates to report downtime duration (#1309)
- Switch to Argon2 as the default hasher for passwords and login tokens
- Optimize DB queries for team membership lookups and for the "Get Pings" API call

###### Bug Fixes
- Fix WebhookValidator to handle input that contains square brackets
- Update Check.rename_and_delete() to better handle race conditions
- Enforce check limit (times two) when pinging by slug
- Fix the "Edit Ntfy" form to preserve selected priorities when the form reloads
- Fix the parsing of inbound emails with UTF8 body (#1311)
- Add rate-limiting by email in the /accounts/signup view

### v4.2

- Date: 2026-04-28
- Version: v4.2
- Original notes: https://github.com/healthchecks/healthchecks/releases/tag/v4.2
- Permalink: https://whatsnew.fyi/product/healthchecks/releases/v4.2

- **changed** — Update the email alert template to cut the beginning of the last ping body
- **changed** — Update the email integration to attach email pings as .eml attachments
- **fixed** — Fix the email integration to handle deep attachment stacks in last ping body
- **fixed** — Fix check name and tag escaping in the Shell integration

###### Improvements
- Update the email alert template to cut the beginning of the last ping body (#939)
- Update the email integration to attach email pings as .eml attachments

###### Bug Fixes
- Fix the email integration to handle deep attachment stacks in last ping body
- Fix check name and tag escaping in the Shell integration

### v4.1.1

- Date: 2026-03-25
- Version: v4.1.1
- Original notes: https://github.com/healthchecks/healthchecks/releases/tag/v4.1.1
- Permalink: https://whatsnew.fyi/product/healthchecks/releases/v4.1.1

- **fixed** — Fix sendalerts to avoid crashing on a timed out db connection
- **fixed** — Fix the update_timeout view to also kick off nags

###### Bug Fixes
- Fix sendalerts to avoid crashing on a timed out db connection (#1267)
- Fix the update_timeout view to also kick off nags

### v4.1

- Date: 2026-03-20
- Version: v4.1
- Original notes: https://github.com/healthchecks/healthchecks/releases/tag/v4.1
- Permalink: https://whatsnew.fyi/product/healthchecks/releases/v4.1

- **removed** — Remove team size limits so users on all plans can now invite many team members
- **added** — Add a one-line summary at the top of monthly/weekly/daily reports
- **fixed** — Fix a formatting issue in Matrix notification template
- **fixed** — Fix emails to never use non-breaking spaces in plain text emails
- **fixed** — Fix the Change Email form to warn the user about TOTP 2FA
- **fixed** — Fix daily reports to show downtime stats for the previous 2 days instead of months
- **fixed** — Fix incorrect Bearer token handling in the Prometheus metrics endpoint
- **fixed** — Fix the Clone function to copy the filter_http_body and filter_default_fail fields
- **fixed** — Fix the ping handler to reject uppercase letters in slug values

###### Improvements
- Remove team size limits: users on all plans can now invite many team members
- Add a one-line summary at the top of monthly/weekly/daily reports

###### Bug Fixes
- Fix a formatting issue in Matrix notification template (#1264, @neoscaler)
- Fix emails to never use non-breaking spaces in plain text emails
- Fix the "Change Email" form to warn the user about TOTP 2FA
- Fix daily reports to show downtime stats for the previous 2 days (not months)
- Fix incorrect Bearer token handling in the Prometheus metrics endpoint
- Fix the "Clone" function to copy the filter_http_body, filter_default_fail fields
- Fix the ping handler to reject uppercase letters in slug values (#1271)

### v4.0

- Date: 2026-01-22
- Version: v4.0
- Original notes: https://github.com/healthchecks/healthchecks/releases/tag/v4.0
- Permalink: https://whatsnew.fyi/product/healthchecks/releases/v4.0

- **removed** — Drop support for Python 3.11 and below; minimum required Python version is now 3.12
- **changed** — Upgrade to Django 6.0
- **changed** — Update the Matrix integration to use Matrix v3 API
- **changed** — Update email alert template to use user's preferred time zone
- **changed** — Update the web UI to use user's preferred timezone instead of browser's timezone
- **added** — Add data migration to update legacy timezones to current canonical timezones
- **changed** — Switch to using multicolor icon font for integration icons
- **fixed** — Fix the text version of email report for recently created checks
- **fixed** — Fix prepare_durations() to assert ping ordering by id not by created date
- **fixed** — Fix the Pause API call and UI action to no-op if the check is already paused

This release drops support of Python 3.11 and below. The minimum required Python
version is 3.12.

##### Improvements
- Upgrade to Django 6.0
- Update the Matrix integration to use Matrix v3 API (#1244)
- Update email alert template to use user's preferred time zone (#1230)
- Update the web UI to use user's preferred timezone instead of browser's timezone
- Add data migration to update legacy timezones to current canonical timezones (#1250)
- Switch to using multicolor icon font for integration icons

###### Bug Fixes
- Fix the text version of email report for recently created checks (#1236, @adelton)
- Fix prepare_durations() to assert ping ordering by id not by created date
- Fix the "Pause" API call and UI action to no-op if the check is already paused

### v3.13

- Date: 2025-11-30
- Version: v3.13
- Original notes: https://github.com/healthchecks/healthchecks/releases/tag/v3.13
- Permalink: https://whatsnew.fyi/product/healthchecks/releases/v3.13

- **added** — Add new content filtering options in the Filtering Rules dialog
- **fixed** — Fix the email integration's unsub view to disable (not delete) the channel
- **added** — Add support for _FILE environment variables
- **fixed** — Pin minio in Dockerfile to a known good version

###### Improvements
- Add new content filtering options in the "Filtering Rules" dialog (#1130, #954)
- Fix the email integration's unsub view to disable (not delete) the channel
- Add support for _FILE environment variables (#1184)

###### Bug Fixes
- Pin minio in Dockerfile to a known good version (#1235)

### v3.12

- Date: 2025-11-26
- Version: v3.12
- Original notes: https://github.com/healthchecks/healthchecks/releases/tag/v3.12
- Permalink: https://whatsnew.fyi/product/healthchecks/releases/v3.12

- **added** — Add rate limiting and a default ntfy.sh token support for ntfy notifications
- **changed** — Sort checks in daily/weekly/monthly reports by downtime duration, then by name
- **changed** — Generate lower-case ping keys to work around broken email providers
- **added** — After creating a ping key show a dialog displaying the new ping key
- **added** — Add a tooltip with timestamp in the checks table, Last Ping column
- **changed** — Update the Zulip transport to allow addressing users by User ID
- **added** — Add hc_check_grace and hc_check_paused Prometheus metrics
- **changed** — Update Docker base image to python:3.13.9-slim-trixie
- **fixed** — Fix cron schedule formatting in Discord notifications
- **fixed** — Fix cron schedule formatting in Rocket.Chat notifications in mobile app

###### Improvements
- Add rate limiting and a default ntfy.sh token support for ntfy notifications
- Sort checks in daily/weekly/monthly reports by downtime duration, then by name (#1095)
- Generate lower-case ping keys to work around broken email providers (#1218)
- After creating a ping key show a dialog displaying the new ping key (#1222)
- Add a tooltip with timestamp in the checks table, "Last Ping" column (#1040)
- Update the Zulip transport to allow addressing users by User ID (#771)
- Add hc_check_grace and hc_check_paused Prometheus metrics (#897, #915)
- Update Docker base image to python:3.13.9-slim-trixie (#1233)

###### Bug Fixes
- Fix cron schedule formatting in Discord notifications
- Fix cron schedule formatting in Rocket.Chat notifications (in mobile app)

### v3.11.2

- Date: 2025-09-02
- Version: v3.11.2
- Original notes: https://github.com/healthchecks/healthchecks/releases/tag/v3.11.2
- Permalink: https://whatsnew.fyi/product/healthchecks/releases/v3.11.2

###### Bug Fixes
- Update Docker image to handle legacy time zones (#1210)

### v3.11.1

- Date: 2025-08-31
- Version: v3.11.1
- Original notes: https://github.com/healthchecks/healthchecks/releases/tag/v3.11.1
- Permalink: https://whatsnew.fyi/product/healthchecks/releases/v3.11.1

- **changed** — Update Dockerfile to use Debian Trixie as the base
- **fixed** — Update Docker image to listen on IPv6 only if LISTEN_IPV6 env var is set

###### Improvements
- Update Dockerfile to use Debian Trixie as the base

###### Bug Fixes
- Update Docker image to listen on IPv6 only if LISTEN_IPV6 env var is set (#1207)

### v3.11

- Date: 2025-08-28
- Version: v3.11
- Original notes: https://github.com/healthchecks/healthchecks/releases/tag/v3.11
- Permalink: https://whatsnew.fyi/product/healthchecks/releases/v3.11

- **added** — Store project API keys in the database in a hashed form
- **changed** — Use hcw_ and hcr_ prefixes in project API keys
- **added** — New integration: Google Chat
- **fixed** — Fix the ping view to handle IPv4-mapped IPv6 addresses
- **changed** — Update Dockerfile to listen on IPv6 as well
- **added** — Add ping_key+slug@... address support when pinging by email
- **added** — Add daily email report option

###### Improvements
- Store project API keys in the database in a hashed form (#1167)
- Use "hcw_" and "hcr_" prefixes in project API keys (#1148)
- New integration: Google Chat (#423)
- Fix the ping view to handle IPv4-mapped IPv6 addresses (#1169)
- Update Dockerfile to listen on IPv6 as well (#1177)
- Add "ping_key+slug@..." address support when pinging by email (#1009)
- Add daily email report option (#1202)