diff --git a/CMakeLists.txt b/CMakeLists.txt
index 034db43af..955a9d397 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -49,7 +49,7 @@ PROJECT(OpenSceneGraph)
 SET(OPENSCENEGRAPH_MAJOR_VERSION 3)
 SET(OPENSCENEGRAPH_MINOR_VERSION 1)
 SET(OPENSCENEGRAPH_PATCH_VERSION 9)
-SET(OPENSCENEGRAPH_SOVERSION 98)
+SET(OPENSCENEGRAPH_SOVERSION 99)
 
 # set to 0 when not a release candidate, non zero means that any generated
 # svn tags will be treated as release candidates of given number
diff --git a/include/osg/Version b/include/osg/Version
index c5cd08c48..17ccfcd35 100644
--- a/include/osg/Version
+++ b/include/osg/Version
@@ -21,7 +21,7 @@ extern "C" {
 #define OPENSCENEGRAPH_MAJOR_VERSION    3
 #define OPENSCENEGRAPH_MINOR_VERSION    1
 #define OPENSCENEGRAPH_PATCH_VERSION    9
-#define OPENSCENEGRAPH_SOVERSION        98
+#define OPENSCENEGRAPH_SOVERSION        99
 
 /* Convenience macro that can be used to decide whether a feature is present or not i.e.
  * #if OSG_MIN_VERSION_REQUIRED(2,9,5)