--- a/apps/lib/CMakeLists.txt
+++ b/apps/lib/CMakeLists.txt
@@ -1,6 +1,6 @@
 # Kate shared library, used by Kate/KWrite and the addons
 add_library(kateprivate SHARED "")
-set_target_properties(kateprivate PROPERTIES VERSION ${RELEASE_SERVICE_VERSION})
+set_target_properties(kateprivate PROPERTIES VERSION ${RELEASE_SERVICE_VERSION} SOVERSION 5)
 install(TARGETS kateprivate ${KDE_INSTALL_TARGETS_DEFAULT_ARGS} LIBRARY NAMELINK_SKIP)
 
 # ensure right translations domain, we use one kate.po(t) for lib + apps