diff --git a/ChangeLog.md b/ChangeLog.md
index 5ff403aea..1f1d11fdd 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -6,6 +6,29 @@ This is the master changelog for Elite Dangerous Market Connector.  Entries are
       in the source (not distributed with the Windows installer) for the
       currently used version.
 ---
+Pre-Release 5.12.1-rc1
+===
+
+This is a release candidate for 5.12.1. It has been pushed to the "Beta" track for updates!
+
+This release fixes a pair of widely-reported bugs with EDMC authentication.
+
+**Changes and Enhancements**
+* Fixed a typo in the prior release notes
+
+**Bug Fixes**
+* Fixed a bug where the EDMC System Profiler wouldn't load details properly
+* Reverted a number of usages of Pathlib back to os.path for further validation testing
+* Fixed a bug where EDMC would error out with a max() ValueError
+
+**Plugin Developers**
+* nb.Entry is deprecated, and is slated for removal in 6.0 or later. Please migrate to nb.EntryMenu
+* nb.ColoredButton is deprecated, and is slated for removal in 6.0 or later. Please migrate to tk.Button
+* Calling internal translations with `_()` is deprecated, and is slated for removal in 6.0 or later. Please migrate to importing `translations` and calling `translations.translate` or `translations.tl` directly
+* `Translations` as the translate system singleton is deprecated, and is slated for removal in 6.0 or later. Please migrate to the `translations` singleton
+* `help_open_log_folder()` is deprecated, and is slated for removal in 6.0 or later. Please migrate to open_folder()
+* `update_feed` is deprecated, and is slated for removal in 6.0 or later. Please migrate to `get_update_feed()`.
+
 Release 5.12.0
 ===
 
diff --git a/config/__init__.py b/config/__init__.py
index ec5a345c2..798979845 100644
--- a/config/__init__.py
+++ b/config/__init__.py
@@ -52,7 +52,7 @@
 # <https://semver.org/#semantic-versioning-specification-semver>
 # Major.Minor.Patch(-prerelease)(+buildmetadata)
 # NB: Do *not* import this, use the functions appversion() and appversion_nobuild()
-_static_appversion = '5.12.0'
+_static_appversion = '5.12.1-beta1'
 _cached_version: semantic_version.Version | None = None
 copyright = '© 2015-2019 Jonathan Harris, 2020-2024 EDCD'