diff --git a/bitcoin-qt.pro b/bitcoin-qt.pro
index f586c5337..853ea93a2 100644
--- a/bitcoin-qt.pro
+++ b/bitcoin-qt.pro
@@ -1,6 +1,6 @@
 TEMPLATE = app
 TARGET =
-VERSION = 0.6.1
+VERSION = 0.6.99
 INCLUDEPATH += src src/json src/qt
 DEFINES += QT_GUI BOOST_THREAD_USE_LIB
 CONFIG += no_include_pwd
diff --git a/doc/README b/doc/README
index a196a461e..4eda8bcd7 100644
--- a/doc/README
+++ b/doc/README
@@ -1,4 +1,4 @@
-Bitcoin 0.6.1 BETA
+Bitcoin 0.6.99 BETA
 
 Copyright (c) 2009-2012 Bitcoin Developers
 Distributed under the MIT/X11 software license, see the accompanying
diff --git a/doc/README_windows.txt b/doc/README_windows.txt
index ec0225fd9..eec252931 100644
--- a/doc/README_windows.txt
+++ b/doc/README_windows.txt
@@ -1,4 +1,4 @@
-Bitcoin 0.6.1 BETA
+Bitcoin 0.6.99 BETA
 
 Copyright (c) 2009-2012 Bitcoin Developers
 Distributed under the MIT/X11 software license, see the accompanying
diff --git a/share/setup.nsi b/share/setup.nsi
index 10bf36b4c..fbbad3769 100644
--- a/share/setup.nsi
+++ b/share/setup.nsi
@@ -5,7 +5,7 @@ SetCompressor /SOLID lzma
 
 # General Symbol Definitions
 !define REGKEY "SOFTWARE\$(^Name)"
-!define VERSION 0.6.1
+!define VERSION 0.6.99
 !define COMPANY "Bitcoin project"
 !define URL http://www.bitcoin.org/
 
@@ -45,13 +45,13 @@ Var StartMenuGroup
 !insertmacro MUI_LANGUAGE English
 
 # Installer attributes
-OutFile bitcoin-0.6.1-win32-setup.exe
+OutFile bitcoin-0.6.99-win32-setup.exe
 InstallDir $PROGRAMFILES\Bitcoin
 CRCCheck on
 XPStyle on
 BrandingText " "
 ShowInstDetails show
-VIProductVersion 0.6.1.3
+VIProductVersion 0.6.99.0
 VIAddVersionKey ProductName Bitcoin
 VIAddVersionKey ProductVersion "${VERSION}"
 VIAddVersionKey CompanyName "${COMPANY}"
diff --git a/src/version.h b/src/version.h
index 9b92bd618..423e885f9 100644
--- a/src/version.h
+++ b/src/version.h
@@ -12,8 +12,8 @@
 
 static const int CLIENT_VERSION_MAJOR       =  0;
 static const int CLIENT_VERSION_MINOR       =  6;
-static const int CLIENT_VERSION_REVISION    =  1;
-static const int CLIENT_VERSION_BUILD       = 3;
+static const int CLIENT_VERSION_REVISION    = 99;
+static const int CLIENT_VERSION_BUILD       =  0;
 
 static const int CLIENT_VERSION =
                            1000000 * CLIENT_VERSION_MAJOR