diff --git a/CHANGELOG.md b/CHANGELOG.md
index 01a4882..31e5fb9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ## [Unreleased]
 
+## [1.0.0] - 2026-06-02
+
 ### Added
 - Every entry in `playbooks/files/websites.yml` now probes both `http` and
   `https`, doubling probe coverage from 16 to 32. Per Red Hat KB 6972355,
@@ -87,4 +89,5 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 - Bare `microsoftonline.com` apex entry; `login.microsoftonline.com` is the
   real probe target and is retained.
 
-[Unreleased]: https://github.com/ericcames/url_checker/compare/HEAD...HEAD
+[Unreleased]: https://github.com/ericcames/url_checker/compare/v1.0.0...HEAD
+[1.0.0]: https://github.com/ericcames/url_checker/releases/tag/v1.0.0