diff --git a/CHANGELOG.md b/CHANGELOG.md
index 20ff8f91..16173f67 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+- No changes yet.
+
+
 ## [1.3.0] - 2018-09-17
 ### Added
 - Accept `prototool.json` files for configuation in addition to
@@ -158,6 +162,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ### Added
 - Initial release.
 
+[Unreleased]: https://github.com/uber/prototool/compare/v1.3.0...HEAD
 [1.3.0]: https://github.com/uber/prototool/compare/v1.2.0...v1.3.0
 [1.2.0]: https://github.com/uber/prototool/compare/v1.1.0...v1.2.0
 [1.1.0]: https://github.com/uber/prototool/compare/v1.0.0...v1.1.0
diff --git a/internal/vars/vars.go b/internal/vars/vars.go
index bc5e25de..4b127feb 100644
--- a/internal/vars/vars.go
+++ b/internal/vars/vars.go
@@ -25,7 +25,7 @@ package vars
 
 const (
 	// Version is the current version.
-	Version = "1.3.0"
+	Version = "1.4.0-dev"
 
 	// DefaultProtocVersion is the default version of protoc from
 	// github.com/protocolbuffers/protobuf to use.