diff --git a/CMakeLists.txt b/CMakeLists.txt
index e1ed305c6f2f5cbdabdd789e29d1ec23b5d97d76..b6fc7b22debe519d8e9c7bb6981b47f7d37803d2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@ set(CMAKE_C_STANDARD 11)
 SET( CPACK_PACKAGE_NAME  "${PROJECT_NAME}")
 SET( CPACK_PACKAGE_VERSION_MAJOR 4)
 SET( CPACK_PACKAGE_VERSION_MINOR 1)
-SET( CPACK_PACKAGE_VERSION_PATCH 19)
+SET( CPACK_PACKAGE_VERSION_PATCH 20)
 
 # init CellFrame SDK
 add_definitions("-DDAP_VERSION=\"${CPACK_PACKAGE_VERSION_MAJOR}\"")
diff --git a/python-cellframe b/python-cellframe
index b3cd47d24aa0b1022cc6975cdece3a0534b8fabe..db050039980452d37f52c79081368114e507b943 160000
--- a/python-cellframe
+++ b/python-cellframe
@@ -1 +1 @@
-Subproject commit b3cd47d24aa0b1022cc6975cdece3a0534b8fabe
+Subproject commit db050039980452d37f52c79081368114e507b943