--- a/testing/geckodriver/README.md
+++ b/testing/geckodriver/README.md
@@ -16,17 +16,17 @@ platforms].
 The canonical source code repository for geckodriver now lives in
 [mozilla-central] under [testing/geckodriver].  You can read more about
 [working with Mozilla source code] on MDN.  This means we do no longer
 accept pull requests on GitHub.  Patches should be uploaded to a bug in
 the [Testing :: GeckoDriver] component.
 
 [WebDriver protocol]: http://w3c.github.io/webdriver/webdriver-spec.html#protocol
 [Firefox remote protocol]: https://developer.mozilla.org/en-US/docs/Mozilla/QA/Marionette
-[change log]: https://github.com/mozilla/geckodriver/blob/master/CHANGES.md
+[change log]: https://searchfox.org/mozilla-central/source/testing/geckodriver/CHANGES.md
 [Releases]: https://github.com/mozilla/geckodriver/releases
 [supported platforms]: #supported-firefoxen
 [mozilla-central]: https://hg.mozilla.org/mozilla-central/
 [testing/geckodriver]: https://hg.mozilla.org/mozilla-central/file/tip/testing/geckodriver
 [working with Mozilla source code]: https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Source_Code
 [Testing :: geckodriver]: https://bugzilla.mozilla.org/buglist.cgi?product=Testing&component=geckodriver&resolution=---&list_id=13613952