diff --git a/README.md b/README.md
index 5cb51e95..5eee6a0e 100644
--- a/README.md
+++ b/README.md
@@ -30,6 +30,11 @@ h5ai is provided under the terms of the [MIT License](http://github.com/lrsjng/h
 ## Changelog
 
 
+### v0.21 - *2012-05-??*
+
+* 
+
+
 ### v0.20 - *2012-05-11*
 
 * adds image preview
diff --git a/build.properties b/build.properties
index 6afaa586..849a0818 100644
--- a/build.properties
+++ b/build.properties
@@ -1,7 +1,7 @@
 
 # project
 project.name       = h5ai
-project.version    = 0.20
+project.version    = 0.21-pre
 
 # src
 src.dir            = src