diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index b8e4c56f..00945a32 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -21,7 +21,7 @@
 # SOFTWARE.
 
 cmake_minimum_required(VERSION 3.23)
-project(mp-units VERSION 2.2.0 LANGUAGES CXX)
+project(mp-units VERSION 2.2.1 LANGUAGES CXX)
 
 set(projectPrefix MP_UNITS_)