Bump version to 2.0.6-dev
diff --git a/changelog.md b/changelog.md
index d3da5d9..34090a8 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,7 @@
 # Changelog - vector_math
 
+## v 2.0.6 - Unreleased
+
 ## v 2.0.5 - July 2017
 
 - Strong mode clean
diff --git a/pubspec.yaml b/pubspec.yaml
index 6eab1e9..44722e1 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: vector_math
-version: 2.0.5
+version: 2.0.6-dev
 author: John McCutchan <john@johnmccutchan.com>
 description: A Vector Math library for 2D and 3D applications.
 homepage: https://github.com/google/vector_math.dart