diff --git a/CHANGELOG b/CHANGELOG
index 7c0e3106..69b9d186 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,6 @@
+# 1.6.3
+  - Fix typespec of message's json_decode! function
+
 # 1.6.2
   - Fix possible double compilation of Empty well-known type
   - Fix dependency on protoc for generated code
diff --git a/mix.exs b/mix.exs
index aa63b6c4..693ef7fc 100644
--- a/mix.exs
+++ b/mix.exs
@@ -4,7 +4,7 @@ defmodule Protox.Mixfile do
   def project do
     [
       app: :protox,
-      version: "1.6.2",
+      version: "1.6.3",
       elixir: "~> 1.7",
       build_embedded: Mix.env() == :prod,
       start_permanent: Mix.env() == :prod,