diff --git a/CMakeLists.txt b/CMakeLists.txt
index f3629f7..d1b2a79 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,7 +25,7 @@
 cmake_minimum_required(VERSION 3.16)
 
 # set the project name
-project(libcifpp VERSION 5.2.0 LANGUAGES CXX)
+project(libcifpp VERSION 5.2.1 LANGUAGES CXX)
 
 list(PREPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 
diff --git a/changelog b/changelog
index 8d48a78..d6b36ec 100644
--- a/changelog
+++ b/changelog
@@ -1,3 +1,8 @@
+Version 5.2.1
+- New versionstring module
+- small fixes for generating documentation
+- correctly setting SONAME
+
 Version 5.2.0
 - With lots of documentation
 - Refactored coloured text output