diff --git a/apps/kolab_guam/src/kolab_guam.app.src b/apps/kolab_guam/src/kolab_guam.app.src
index 82bce62..217b14a 100644
--- a/apps/kolab_guam/src/kolab_guam.app.src
+++ b/apps/kolab_guam/src/kolab_guam.app.src
@@ -1,20 +1,20 @@
 %% -*- tab-width: 4;erlang-indent-level: 4;indent-tabs-mode: nil -*-
 {application, kolab_guam,
  [
   {description, "IMAP session proxy"},
-  {vsn, "0.8.3"},
+  {vsn, "0.9.0"},
   {registered, []},
   {applications, [
                   kernel,
                   stdlib,
                   compiler,
                   syntax_tools,
                   goldrush,
                   lager,
                   crypto,
                   ssl
                  ]},
   {mod, { kolab_guam, []}},
   {env, [
     ]}
  ]}.