diff --git a/rel/reltool.config b/rel/reltool.config
index 1ece54f..044fe9f 100644
--- a/rel/reltool.config
+++ b/rel/reltool.config
@@ -1,51 +1,51 @@
 %% -*- mode: erlang -*-
 %% ex: ft=erlang
 {sys, [
        {lib_dirs, ["../deps"]},
        {erts, [{mod_cond, derived}, {app_file, strip}]},
        {app_file, strip},
-       {rel, "kolab_guam", "0.9",
+       {rel, "kolab_guam", "0.8.1",
         [
          kernel,
          stdlib,
          sasl,
          compiler,
          syntax_tools,
          goldrush,
          lager,
          lager_syslog,
          crypto,
          kolab_guam
         ]},
        {rel, "start_clean", "",
         [
          kernel,
          stdlib
         ]},
        {boot_rel, "kolab_guam"},
        {profile, embedded},
        {incl_cond, derived},
        {excl_archive_filters, [".*"]}, %% Do not archive built libs
        {excl_sys_filters, ["^bin/(?!start_clean.boot)",
                            "^erts.*/bin/(dialyzer|typer)",
                            "^erts.*/(doc|info|include|lib|man|src)"]},
        {excl_app_filters, ["\.gitignore"]},
        {app, kolab_guam, [{mod_cond, app}, {incl_cond, include}, {lib_dir, "../apps/kolab_guam"}]}
       ]}.
 
 {target_dir, "kolab_guam"}.
 
 {overlay, [
            {mkdir, "log/sasl"},
            {copy, "files/erl", "\{\{erts_vsn\}\}/bin/erl"},
            {copy, "files/nodetool", "releases/\{\{rel_vsn\}\}/nodetool"},
            {copy, "kolab_guam/bin/start_clean.boot",
                   "\{\{erts_vsn\}\}/bin/start_clean.boot"},
            {copy, "files/kolab_guam", "bin/kolab_guam"},
            {copy, "files/kolab_guam.cmd", "bin/kolab_guam.cmd"},
            {copy, "files/start_erl.cmd", "bin/start_erl.cmd"},
            %% Following line may be safely removed in new projects
            {copy, "files/install_upgrade.escript", "bin/install_upgrade.escript"},
            {copy, "files/sys.config", "releases/\{\{rel_vsn\}\}/sys.config"},
            {copy, "files/vm.args", "releases/\{\{rel_vsn\}\}/vm.args"}
           ]}.