--- a/src/lib/astro/CMakeLists.txt	2018-01-10 08:43:24.000000000 +0100
+++ b/src/lib/astro/CMakeLists.txt	2018-02-10 15:08:03.545093856 +0100
@@ -6,7 +6,7 @@
 )
 
 set(ASTRO_LIB_VERSION "0.17.20")
-set(ASTRO_LIB_SOVERSION "1")
+set(ASTRO_LIB_SOVERSION "2")
 
 ADD_DEFINITIONS(-O3)
 
--- a/src/lib/marble/declarative/CMakeLists.txt	2018-01-10 08:43:24.000000000 +0100
+++ b/src/lib/marble/declarative/CMakeLists.txt	2018-02-10 15:08:55.007096153 +0100
@@ -30,6 +30,10 @@
     RouteRelationModel.cpp
 )
 
+set_target_properties(marbledeclarative PROPERTIES
+    SOVERSION 2
+)
+
 generate_export_header(marbledeclarative BASE_NAME marble_declarative)
 target_include_directories(marbledeclarative PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>)
 
