diff --git a/CHANGELOG.md b/CHANGELOG.md
index f63fbafe..8d322221 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,10 @@ change warranting a new major release:
 
 # [unreleased]
 
+# [v1.27.0] 2023-02-09
+
+eive-tmtc: v2.12.2
+
 ## Added
 
 - First version of a TCS controller heater control loop.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index a221f578..60b4bf0b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,8 +10,8 @@
 cmake_minimum_required(VERSION 3.13)
 
 set(OBSW_VERSION_MAJOR 1)
-set(OBSW_VERSION_MINOR 26)
-set(OBSW_VERSION_REVISION 2)
+set(OBSW_VERSION_MINOR 27)
+set(OBSW_VERSION_REVISION 0)
 
 # set(CMAKE_VERBOSE TRUE)