diff --git a/CHANGELOG.md b/CHANGELOG.md
index 464a76151..ea19b59ab 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.4.0 (unreleased)
+
+
+
 ## 0.3.10 (October 20, 2013)
 
 FEATURES:
diff --git a/packer/version.go b/packer/version.go
index 8c83464fa..096edac65 100644
--- a/packer/version.go
+++ b/packer/version.go
@@ -10,12 +10,12 @@ import (
 var GitCommit string
 
 // The version of packer.
-const Version = "0.3.10"
+const Version = "0.4.0"
 
 // Any pre-release marker for the version. If this is "" (empty string),
 // then it means that it is a final release. Otherwise, this is the
 // pre-release marker.
-const VersionPrerelease = ""
+const VersionPrerelease = "dev"
 
 type versionCommand byte