diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7c695d2c5b60ab817cf30ceb467e469a5378bb37..6c398b6c954af2c696f052e6d5bfb86f8ef5a17f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 ## [Unreleased]
 
+## [4.2] - 2019-09-27
+- Fix compiling Walberla on certain compilers
+- Fix compilation failure in ParserUBB and ExtendedBoundaryHandlingFactory
+- add missing std::hash specializations for Cell, Vector2, Vector3
+
 ## [4.1] - 2019-04-19
 ### Added
 - Galerkin coarsening for Multigrid
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3e5dc0ce7d31df6bb586ffa2a5e8c39204db5ce7..4eda282c6d3c4fea2462ffa705bf7c27aae67bb5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -34,7 +34,7 @@ set ( CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${walberla_SOURCE_DIR}/cmake )
 
 include ( waLBerlaFunctions )
 
-set_version( 4 1 )
+set_version( 4 2 )
 
 include( CMakeParseArguments )