diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2e0210de..7de646c4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,7 +5,7 @@
 cmake_minimum_required(VERSION 2.6)
 
 project(libmozjpeg C)
-set(VERSION 1.0.0)
+set(VERSION 2.0pre)
 
 if(MINGW OR CYGWIN)
   execute_process(COMMAND "date" "+%Y%m%d" OUTPUT_VARIABLE BUILD)
diff --git a/configure.ac b/configure.ac
index 82b3d7d5..939c259b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.56])
-AC_INIT([libmozjpeg], [1.0.2])
+AC_INIT([libmozjpeg], [2.0pre])
 BUILD=`date +%Y%m%d`
 
 AM_INIT_AUTOMAKE([-Wall foreign dist-bzip2])