diff --git a/TODO.t2t b/TODO.t2t
index 92a4736..0037bac 100644
--- a/TODO.t2t
+++ b/TODO.t2t
@@ -56,7 +56,6 @@ Work to do in OwlPS
 - Add option dump-configuration (displays the config & exits).
 
 - CMake:
-  - libraries: version numbers (sonames) and symbolic links
   - installation targets
 
 - Support string-based positioning requests
diff --git a/libowlps-client/CMakeLists.txt b/libowlps-client/CMakeLists.txt
index 9d0db9e..12371e8 100644
--- a/libowlps-client/CMakeLists.txt
+++ b/libowlps-client/CMakeLists.txt
@@ -2,6 +2,10 @@ add_library(libowlps-client.a STATIC libowlps-client.c)
 add_library(libowlps-client.so SHARED libowlps-client.c)
 set_target_properties(
   libowlps-client.a libowlps-client.so
-  PROPERTIES OUTPUT_NAME owlps-client)
+  PROPERTIES
+  OUTPUT_NAME owlps-client
+  SOVERSION 1
+  VERSION 1.0
+  )
 target_link_libraries(libowlps-client.so libowlps.so)
 target_link_libraries(libowlps-client.a libowlps.a)
diff --git a/libowlps-resultreader/CMakeLists.txt b/libowlps-resultreader/CMakeLists.txt
index 062e69a..157d6db 100644
--- a/libowlps-resultreader/CMakeLists.txt
+++ b/libowlps-resultreader/CMakeLists.txt
@@ -2,7 +2,11 @@ add_library(libowlps-resultreader.a STATIC libowlps-resultreader.c)
 add_library(libowlps-resultreader.so SHARED libowlps-resultreader.c)
 set_target_properties(
   libowlps-resultreader.a libowlps-resultreader.so
-  PROPERTIES OUTPUT_NAME owlps-resultreader)
+  PROPERTIES
+  OUTPUT_NAME owlps-resultreader
+  SOVERSION 1
+  VERSION 1.0
+  )
 target_link_libraries(libowlps-resultreader.so libowlps.so)
 target_link_libraries(libowlps-resultreader.a libowlps.a)
 
diff --git a/libowlps/CMakeLists.txt b/libowlps/CMakeLists.txt
index 7fda6b1..7255025 100644
--- a/libowlps/CMakeLists.txt
+++ b/libowlps/CMakeLists.txt
@@ -2,4 +2,8 @@ add_library(libowlps.a STATIC libowlps.c)
 add_library(libowlps.so SHARED libowlps.c)
 set_target_properties(
   libowlps.a libowlps.so
-  PROPERTIES OUTPUT_NAME owlps)
+  PROPERTIES
+  OUTPUT_NAME owlps
+  SOVERSION 3
+  VERSION 3.1
+  )