diff --git a/CHANGELOG.md b/CHANGELOG.md
index ca199beb0bdbc2aa52d8f24ac30990c21b9e0d64..79827f685217e2ec25a11e23e209d40e81e55ac3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,8 @@ All notable changes to this project are documented below.
 
 The format is based on [keep a changelog](http://keepachangelog.com/) and this project uses [semantic versioning](http://semver.org/).
 
+## [Unreleased]
+
 ## [0.12.1] - 2017-03-28
 ### Added
 - Optionally allow JSON encoding in user login/register operations and responses.
diff --git a/Makefile b/Makefile
index 26caf0db0a91d587dcde8d985acb31df7fd85a29..3e00c1294e79a1152fabdc4022b39ffb3673f768 100644
--- a/Makefile
+++ b/Makefile
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 BINNAME := nakama
-VERSION := 0.12.1
+VERSION := 0.13.0-dev
 BUILDDIR := build
 COMMITID := $(shell git rev-parse --short HEAD 2>/dev/null || echo nosha)