diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3b1c6de0..c387a4a7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,10 +16,13 @@ will consitute of a breaking change warranting a new major release:
 
 # [unreleased]
 
+# [v1.39.1] 2023-03-22
+
 ## Fixed
 
 - Bugfix for STR: Some action commands wrongfully declined.
 - STR: No normal command handling while a special request like an image upload is active.
+- RS485 data line was not enabled when the transmitter was switched on.
 
 # [v1.39.0] 2023-03-21
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
index eca97197..8a966ea9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,7 +11,7 @@ cmake_minimum_required(VERSION 3.13)
 
 set(OBSW_VERSION_MAJOR 1)
 set(OBSW_VERSION_MINOR 39)
-set(OBSW_VERSION_REVISION 0)
+set(OBSW_VERSION_REVISION 1)
 
 # set(CMAKE_VERBOSE TRUE)