diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -162,7 +162,7 @@ else()
 endif()
 
 # default version
-set(VERSION_STRING "0.9.0")
+set(VERSION_STRING "0.9.1")
 set(VERSION_REVISION "0")
 
 # get revision number from mercurial and parse version string