diff --git a/include/osg/Version b/include/osg/Version
index d4cd32b80..23640e5f0 100644
--- a/include/osg/Version
+++ b/include/osg/Version
@@ -21,7 +21,7 @@ extern "C" {
 #define OPENSCENEGRAPH_MAJOR_VERSION    2
 #define OPENSCENEGRAPH_MINOR_VERSION    9
 #define OPENSCENEGRAPH_PATCH_VERSION    8
-#define OPENSCENEGRAPH_SOVERSION        64
+#define OPENSCENEGRAPH_SOVERSION        66
 
 /* 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)