diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6d1f7921..ed9df86c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 ## Changelog
 
+## v0.6.4
+
+* Enhancements
+  * Validation of UserCode arguments to help ensure usage of Grizzly
+    follows the Z-Wave specification
+
 ## v0.6.3
 
 * Enhancements
diff --git a/mix.exs b/mix.exs
index 2140f88d..65385fbf 100644
--- a/mix.exs
+++ b/mix.exs
@@ -4,7 +4,7 @@ defmodule Grizzly.MixProject do
   def project do
     [
       app: :grizzly,
-      version: "0.6.3",
+      version: "0.6.4",
       elixir: "~> 1.5",
       elixirc_paths: elixirc_paths(Mix.env()),
       start_permanent: Mix.env() == :prod,