diff --git a/CHANGELOG.md b/CHANGELOG.md
index 34b83251..8403fcf2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,8 @@ will consitute of a breaking change warranting a new major release:
 
 # [unreleased]
 
+# [v6.6.0] 2023-09-18
+
 ## Changed
 
 - Changed the memory initialized for the PDEC Config Memory and the PDEC RAM by using `mmap`
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ba4289c2..65038b76 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,8 +10,8 @@
 cmake_minimum_required(VERSION 3.13)
 
 set(OBSW_VERSION_MAJOR 6)
-set(OBSW_VERSION_MINOR 5)
-set(OBSW_VERSION_REVISION 1)
+set(OBSW_VERSION_MINOR 6)
+set(OBSW_VERSION_REVISION 0)
 
 # set(CMAKE_VERBOSE TRUE)