diff --git a/CHANGELOG.md b/CHANGELOG.md
index 29263c0c1..38cb3b819 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.4.0 (unreleased)
+
+
+
 ## 0.3.7 (February 19, 2015)
 
 IMPROVEMENTS:
diff --git a/version.go b/version.go
index caab3f0f6..8862f9e35 100644
--- a/version.go
+++ b/version.go
@@ -4,9 +4,9 @@ package main
 var GitCommit string
 
 // The main version number that is being run at the moment.
-const Version = "0.3.7"
+const Version = "0.4.0"
 
 // A pre-release marker for the version. If this is "" (empty string)
 // then it means that it is a final release. Otherwise, this is a pre-release
 // such as "dev" (in development), "beta", "rc1", etc.
-const VersionPrerelease = ""
+const VersionPrerelease = "dev"