diff --git a/CMakeLists.txt b/CMakeLists.txt
index e68e3b2..e9d11bf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,7 +4,7 @@
 
 cmake_minimum_required(VERSION 3.8)
 
-project(sdbus-c++ VERSION 0.5.1 LANGUAGES C CXX)
+project(sdbus-c++ VERSION 0.5.2 LANGUAGES C CXX)
 
 include(GNUInstallDirs) # Installation directories for `install` command and pkgconfig file
 
diff --git a/ChangeLog b/ChangeLog
index d9a8396..0085905 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -65,3 +65,6 @@ v0.5.1
 - Rename sdbus-c++ stub code generator executable
 - Introduce generation of doxygen documentation
 - Improve documentation
+
+v0.5.2
+- Simplify and unify basic API level callbacks for both sync and async methods