diff --git a/VERSION b/VERSION
index 9666cd4..81e22a1 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.5+
+0.6.0pre
diff --git a/package.json b/package.json
index 2211194..95d65e9 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "peg",
   "description": "Parser generator for JavaScript",
-  "version": "0.5.0",
+  "version": "0.6.0pre",
   "author": "David Majda <david@majda.cz> (http://majda.cz/)",
   "homepage": "http://pegjs.majda.cz/",
   "repository": "git://github.com/dmajda/pegjs.git",