diff --git a/CPackConfig.cmake b/CPackConfig.cmake
index b3c3d728..447a1d86 100644
--- a/CPackConfig.cmake
+++ b/CPackConfig.cmake
@@ -13,7 +13,7 @@ set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_SOURCE_DIR}/COPYING")
 ### versions
 set(CPACK_PACKAGE_VERSION_MAJOR "0")
 set(CPACK_PACKAGE_VERSION_MINOR "4")
-set(CPACK_PACKAGE_VERSION_PATCH "90")
+set(CPACK_PACKAGE_VERSION_PATCH "91")
 set(CPACK_PACKAGE_VERSION "${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}.${CPACK_PACKAGE_VERSION_PATCH}")