diff --git a/CMakeLists.txt b/CMakeLists.txt
index d94e082af..0d0b4a2a3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.8)
 project(libtorrent)
-set (SOVERSION "8")
+set (SOVERSION "9")
 set (VERSION "1.1.10")
 
 set(sources