diff --git a/CHANGELOG.md b/CHANGELOG.md
index e032c95d..5e921cc9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,8 @@ will consitute of a breaking change warranting a new major release:
 
 # [unreleased]
 
+# [v1.31.1]
+
 ## Fixed
 
 - ACS Controller: Correction for size of MEKF dataset and some optimization and possible fixes
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1c698dfe..a0768ddd 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 31)
-set(OBSW_VERSION_REVISION 0)
+set(OBSW_VERSION_REVISION 1)
 
 # set(CMAKE_VERBOSE TRUE)