diff --git a/src/lib/CMakeLists.txt b/src/lib/CMakeLists.txt
index d3cd6712..cfd8fdab 100644
--- a/src/lib/CMakeLists.txt
+++ b/src/lib/CMakeLists.txt
@@ -1,89 +1,89 @@
 set( cantor_LIB_SRCS
   session.cpp
   expression.cpp
   backend.cpp
   result.cpp
   textresult.cpp
   imageresult.cpp
   epsresult.cpp
   latexresult.cpp
   latexrenderer.cpp
   helpresult.cpp
   animationresult.cpp
   extension.cpp
   assistant.cpp
   completionobject.cpp
   syntaxhelpobject.cpp
   defaulthighlighter.cpp
   defaultvariablemodel.cpp
   panelplugin.cpp
   panelpluginhandler.cpp
   worksheetaccess.cpp
   directives/plotdirectives.cpp
 )
 
 Set( cantor_LIB_HDRS
   cantor_macros.h
   #base classes
   backend.h
   session.h
   expression.h
   extension.h
   syntaxhelpobject.h
   completionobject.h
   #results
   animationresult.h
   epsresult.h
   helpresult.h
   imageresult.h
   latexresult.h
   result.h
   textresult.h
   #helper classes
   defaulthighlighter.h
   defaultvariablemodel.h
   worksheetaccess.h
 )
 
 ki18n_wrap_ui(cantor_LIB_SRCS directives/axisrange.ui directives/plottitle.ui)
 
 kconfig_add_kcfg_files(cantor_LIB_SRCS settings.kcfgc)
 install(FILES cantor_libs.kcfg DESTINATION ${KDE_INSTALL_KCFGDIR})
 
 configure_file (config-cantorlib.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config-cantorlib.h )
 
 add_library( cantorlibs  SHARED ${cantor_LIB_SRCS} )
 generate_export_header(cantorlibs BASE_NAME cantor)
 
 kcoreaddons_desktop_to_json(cantorlibs cantor_assistant.desktop DEFAULT_SERVICE_TYPE)
 kcoreaddons_desktop_to_json(cantorlibs cantor_backend.desktop DEFAULT_SERVICE_TYPE)
 kcoreaddons_desktop_to_json(cantorlibs cantor_panelplugin.desktop DEFAULT_SERVICE_TYPE)
 
 target_link_libraries( cantorlibs
   KF5::Completion
   KF5::IconThemes
   KF5::KIOCore
   KF5::KIOFileWidgets
   KF5::KIOWidgets
   KF5::Archive
   KF5::ConfigCore
   KF5::ConfigGui
   KF5::I18n
   KF5::XmlGui
   ${QT5_LIBRARIES}
   Qt5::Xml
 )
 
-set_target_properties( cantorlibs PROPERTIES VERSION ${KDE_APPLICATIONS_VERSION} SOVERSION 20)
+set_target_properties( cantorlibs PROPERTIES VERSION ${KDE_APPLICATIONS_VERSION} SOVERSION 21)
 
 
 install( TARGETS cantorlibs  ${KDE_INSTALL_TARGETS_DEFAULT_ARGS} )
 
 install( FILES ${cantor_LIB_HDRS} ${CMAKE_CURRENT_BINARY_DIR}/cantor_export.h
   DESTINATION ${KDE_INSTALL_INCLUDEDIR}/cantor
   COMPONENT Devel
 )
 
 if(BUILD_TESTING)
   add_subdirectory(test)
 endif()