diff --git a/CMakeLists.txt b/CMakeLists.txt
index 13cb935..9125925 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,7 @@
 
 cmake_minimum_required (VERSION 3.14...3.27)
 project (utf8cpp 
-         VERSION 4.0.5
+         VERSION 4.0.6
          LANGUAGES CXX
          DESCRIPTION "C++ portable library for working with utf-8 encoding")