diff --git a/ChangeLog.md b/ChangeLog.md
index b4f5a1f8..7b10f97f 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -27,6 +27,16 @@ produce the Windows executables and installer.
 
 ---
 
+Pre-Release 5.2.1-rc1
+===
+
+This release primarily addresses the issue of the program asking for 
+Frontier authorization much too often.
+
+* Actually utilise the Frontier Refresh Token when the CAPI response is 
+  "Unauthorized".  The re-factoring of this code to make CAPI queries 
+  threaded inadvertently prevented this.
+
 Release 5.2.0
 ===
 
diff --git a/config.py b/config.py
index 8660397f..611e15f5 100644
--- a/config.py
+++ b/config.py
@@ -33,7 +33,7 @@ appcmdname = 'EDMC'
 # <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 = '5.2.0'
+_static_appversion = '5.2.1-rc1'
 _cached_version: Optional[semantic_version.Version] = None
 copyright = '© 2015-2019 Jonathan Harris, 2020-2021 EDCD'