diff --git a/CMakeLists.txt b/CMakeLists.txt
index e1be366..7b330d6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 2.8)
 
 # Grive version. remember to update it for every new release!
-set( GRIVE_VERSION "0.5" )
+set( GRIVE_VERSION "0.5.1-dev" )
 
 # common compile options
 add_definitions( -DVERSION="${GRIVE_VERSION}" )
diff --git a/README.md b/README.md
index 08f0735..ce32d50 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# Grive2 0.5
+# Grive2 0.5.1-dev
 
 14 Jan 2016, Vitaliy Filippov