diff --git a/mk/linux/mg-version.sh b/mk/linux/mg-version.sh
index 1334a9a8..c37441dc 100755
--- a/mk/linux/mg-version.sh
+++ b/mk/linux/mg-version.sh
@@ -4,9 +4,9 @@
 # Written by Mark Vejvoda <mark_vejvoda@hotmail.com>
 # Copyright (c) 2011 Mark Vejvoda under GNU GPL v3.0+
 
-OLD_MG_VERSION=3.9.1
-OLD_MG_VERSION_BINARY=3.9.1
-MG_VERSION=3.11.0
+OLD_MG_VERSION=3.11.0
+OLD_MG_VERSION_BINARY=3.11.0
+MG_VERSION=3.12-dev
 
 if [ "$1" = "--oldversion" ]; then
   echo "$OLD_MG_VERSION"
diff --git a/mk/linux/mojosetup/megaglest-installer/scripts/config.lua b/mk/linux/mojosetup/megaglest-installer/scripts/config.lua
index d5508439..d9c4197b 100644
--- a/mk/linux/mojosetup/megaglest-installer/scripts/config.lua
+++ b/mk/linux/mojosetup/megaglest-installer/scripts/config.lua
@@ -1,5 +1,5 @@
 local GAME_INSTALL_SIZE = 680000000;
-local GAME_VERSION = "3.11.0";
+local GAME_VERSION = "3.12-dev";
 
 local _ = MojoSetup.translate
 
diff --git a/mk/windoze/Installer/MegaGlestInstaller.nsi b/mk/windoze/Installer/MegaGlestInstaller.nsi
index a70e64e7..ff280e01 100644
--- a/mk/windoze/Installer/MegaGlestInstaller.nsi
+++ b/mk/windoze/Installer/MegaGlestInstaller.nsi
@@ -3,8 +3,8 @@
 
 !define APNAME MegaGlest
 !define APNAME_OLD Mega-Glest
-!define APVER_OLD 3.9.1
-!define APVER 3.11.0
+!define APVER_OLD 3.11.0
+!define APVER 3.12-dev
 
 Name "${APNAME} ${APVER}"
 SetCompressor /FINAL /SOLID lzma
diff --git a/mk/windoze/Installer/MegaGlestUpdater.nsi b/mk/windoze/Installer/MegaGlestUpdater.nsi
index 2afb3d96..b1efc649 100644
--- a/mk/windoze/Installer/MegaGlestUpdater.nsi
+++ b/mk/windoze/Installer/MegaGlestUpdater.nsi
@@ -2,10 +2,10 @@
 ; General Attributes
 
 !define APNAME MegaGlest
-!define APVER 3.11.0
+!define APVER 3.12-dev
 !define APNAME_OLD Mega-Glest
-!define APVER_OLD 3.9.1
-!define APVER_UPDATE 3.11.0
+!define APVER_OLD 3.11.0
+!define APVER_UPDATE 3.12-dev
 
 Name "${APNAME} ${APVER_UPDATE}"
 SetCompressor /FINAL /SOLID lzma
diff --git a/source/glest_game/facilities/game_util.cpp b/source/glest_game/facilities/game_util.cpp
index 6fd7eead..fae6f020 100644
--- a/source/glest_game/facilities/game_util.cpp
+++ b/source/glest_game/facilities/game_util.cpp
@@ -32,7 +32,7 @@ const char *mailString				= " http://bugs.megaglest.org";
 // !! Use minor versions !!  Only major and minor version control compatibility!
 // typical version numbers look like this: v3.11-beta1.0   v3.12-dev   v3.12.0
 // don't forget to update mk/linux/mg-version.sh
-const string glestVersionString 	= "v3.11.0";
+const string glestVersionString 	= "v3.12-dev";
 const string lastCompatibleSaveGameVersionString 	= "v3.9.0";
 
 #if defined(GITVERSION)